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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Sep. 30, 2016	Nov. 02, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	AMN HEALTHCARE SERVICES INC
Entity Central Index Key	0001142750
Document Type	10-Q
Document Period End Date	Sep. 30, 2016
Amendment Flag	false
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		48,049,426

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 15,708	$ 9,576
Accounts receivable, net of allowances of $7,886 and $7,691 at September 30, 2016 and December 31, 2015, respectively	331,220	277,996
Accounts receivable, subcontractor	42,094	50,807
Prepaid expenses	13,928	13,526
Other current assets	30,707	23,723
Total current assets	433,657	375,628
Restricted cash, cash equivalents and investments	28,222	27,352
Fixed assets, net of accumulated depreciation of $84,940 and $76,680 at September 30, 2016 and December 31, 2015, respectively	57,965	50,134
Other assets	57,296	47,569
Goodwill	342,174	204,779
Intangible assets, net of accumulated amortization of $67,326 and $53,747 at September 30, 2016 and December 31, 2015, respectively	250,455	174,970
Total assets	1,169,769	880,432
Current liabilities:
Accounts payable and accrued expenses	118,289	118,822
Accrued compensation and benefits	99,629	83,701
Current portion of revolving credit facility	0	30,000
Current portion of notes payable	3,750	7,500
Deferred revenue	8,446	5,620
Other current liabilities	9,962	5,374
Total current liabilities	240,076	251,017
Revolving credit facility	182,500	52,500
Notes payable, less unamortized fees	198,793	128,490
Deferred income taxes, net	28,278	22,431
Other long-term liabilities	86,949	78,134
Total liabilities	736,596	532,572
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.01 par value; 10,000 shares authorized; none issued and outstanding at September 30, 2016 and December 31, 2015	0	0
Common stock, $0.01 par value; 200,000 shares authorized; 48,049 and 47,709 shares issued and outstanding at September 30, 2016 and December 31, 2015, respectively	480	477
Additional paid-in capital	449,733	443,733
Accumulated deficit	(16,679)	(96,167)
Accumulated other comprehensive loss	(361)	(183)
Total stockholders’ equity	433,173	347,860
Total liabilities and stockholders’ equity	$ 1,169,769	$ 880,432

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Accounts receivable, allowance	$ 7,886	$ 7,691
Accumulated depreciation	84,940	76,680
Accumulated amortization	$ 67,326	$ 53,747
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	48,049,000	47,709,000
Common stock, shares outstanding	48,049,000	47,709,000

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Revenue	$ 472,636	$ 382,859	$ 1,414,367	$ 1,060,513
Cost of revenue	318,169	256,850	953,249	722,954
Gross profit	154,467	126,009	461,118	337,559
Operating expenses:
Selling, general and administrative	99,995	83,098	297,359	229,377
Depreciation and amortization	7,789	5,304	21,888	15,631
Total operating expenses	107,784	88,402	319,247	245,008
Income from operations	46,683	37,607	141,871	92,551
Interest expense, net, and other	3,016	2,013	9,065	5,797
Income before income taxes	43,667	35,594	132,806	86,754
Income tax expense	16,371	1,947	53,319	25,028
Net income	27,296	33,647	79,487	61,726
Other comprehensive income (loss):
Foreign currency translation and other	40	54	165	42
Unrealized gain (loss) on cash flow hedge, net of income taxes	231	(367)	(343)	(331)
Other comprehensive income (loss)	271	(313)	(178)	(289)
Comprehensive income	$ 27,567	$ 33,334	$ 79,309	$ 61,437
Net income per common share:
Basic (in dollars per share)	$ 0.57	$ 0.71	$ 1.66	$ 1.30
Diluted (in dollars per share)	$ 0.55	$ 0.69	$ 1.61	$ 1.27
Weighted average common shares outstanding:
Basic (shares)	48,049	47,674	47,993	47,466
Diluted (shares)	49,410	48,978	49,287	48,737

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 79,487	$ 61,726
Adjustments to reconcile net income to net cash provided by operating activities, net of acquisitions:
Depreciation and amortization	21,888	15,631
Non-cash interest expense and other	1,180	1,445
Change in fair value of contingent consideration	(88)	(300)
Increase in allowances for doubtful accounts and sales credits	6,746	5,315
Provision for deferred income taxes	(3,209)	17,683
Share-based compensation	8,795	6,551
Excess tax benefits from share-based compensation	(2,764)	(7,269)
Loss on disposal or sale of fixed assets	45	3
Changes in assets and liabilities, net of effects from acquisitions:
Accounts receivable	(42,594)	(46,732)
Accounts receivable, subcontractor	8,681	(21,078)
Income taxes receivable	6,160	1,008
Prepaid expenses	(195)	(2,213)
Other current assets	(10,109)	(6,111)
Other assets	(4,295)	(3,454)
Accounts payable and accrued expenses	(791)	25,808
Accrued compensation and benefits	10,761	16,707
Other liabilities	5,736	(4,365)
Deferred revenue	256	1,140
Restricted cash, cash equivalents and investments balance	(870)	(5,858)
Net cash provided by operating activities	84,820	55,637
Cash flows from investing activities:
Purchase and development of fixed assets	(17,705)	(21,122)
Equity method investment in Pipeline Health Holdings LLC	0	(1,000)
Payments to fund deferred compensation plan	(5,665)	(2,250)
Cash paid for acquisitions, net of cash received	(216,553)	(81,097)
Cash paid for working capital adjustments and holdback liability for prior year acquisitions	(1,348)	(165)
Net cash used in investing activities	(241,271)	(105,634)
Cash flows from financing activities:
Capital lease repayments	(6)	(4)
Payments on term loan	(8,438)	(5,625)
Proceeds from term loan	75,000	0
Payments on revolving credit facility	(24,000)	(27,000)
Proceeds from revolving credit facility	124,000	84,500
Payment of financing costs	(448)	0
Earn-out payment for prior acquisition	(900)	0
Proceeds from exercise of equity awards	0	3,663
Cash paid for shares withheld for taxes	(5,554)	(11,513)
Excess tax benefits from share-based compensation	2,764	7,269
Net cash provided by financing activities	162,418	51,290
Effect of exchange rate changes on cash	165	42
Net increase in cash and cash equivalents	6,132	1,335
Cash and cash equivalents at beginning of period	9,576	13,073
Cash and cash equivalents at end of period	15,708	14,408
Supplemental disclosures of cash flow information:
Cash paid for interest (net of $158 and $173 capitalized for the nine months ended September 30, 2016 and 2015, respectively)	7,106	4,334
Cash paid for income taxes	52,684	20,655
Acquisitions:
Fair value of tangible assets acquired in acquisitions, net of cash received	18,789	26,340
Goodwill	136,521	46,891
Intangible assets	89,064	33,592
Liabilities assumed	(21,921)	(22,526)
Holdback provision	(1,830)	(500)
Earn-out liabilities	(4,070)	(2,700)
Net cash paid for acquisitions	(216,553)	(81,097)
Supplemental disclosures of non-cash investing and financing activities:
Purchase of fixed assets recorded in accounts payable and accrued expenses	1,370	2,206
Convertible loan converted to equity method investment in Pipeline Health Holdings LLC	$ 0	$ 1,000

Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Statement of Cash Flows [Abstract]
Interest capitalized	$ 158	$ 173

Basis of Presentation	9 Months Ended
Basis of Presentation	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION The condensed consolidated balance sheets and related condensed consolidated statements of comprehensive income and cash flows contained in this Quarterly Report on Form 10-Q (this “Quarterly Report”), which are unaudited, include the accounts of AMN Healthcare Services, Inc. and its wholly-owned subsidiaries (collectively, the “Company”). All significant intercompany balances and transactions have been eliminated in consolidation. In the opinion of management, all entries necessary for a fair presentation of such unaudited condensed consolidated financial statements have been included. These entries consisted of all normal recurring items. The results of operations for the interim period are not necessarily indicative of the results to be expected for any other interim period or for the entire fiscal year or for any future period. The unaudited condensed consolidated financial statements do not include all information and notes necessary for a complete presentation of financial position, results of operations and cash flows in conformity with accounting principles generally accepted in the United States. Please refer to the Company’s audited consolidated financial statements and the related notes for the fiscal year ended December 31, 2015, contained in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2015, filed with the Securities and Exchange Commission on February 24, 2016 (“2015 Annual Report”). The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make a number of estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities at the dates of the financial statements and the reported amounts of revenue and expenses during the reporting periods. On an ongoing basis, the Company evaluates its estimates, including those related to asset impairments, accruals for self-insurance, compensation and related benefits, accounts receivable, contingencies and litigation, earn-out liabilities, and income taxes. Actual results could differ from those estimates under different assumptions or conditions. Recently Adopted Accounting Pronouncements In April 2015, the Financial Accounting Standards Board (“FASB”) issued ASU 2015-05, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40), Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement.” This standard provides guidance about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the software license element of the arrangement should be accounted for by the customer consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The Company adopted this pronouncement prospectively beginning January 1, 2016, and the adoption did not have a material effect on the Company’s consolidated financial statements. In September 2015, the FASB issued ASU 2015-16, “Business Combinations - Simplifying the Accounting for Measurement-Period Adjustments.” This standard requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The standard requires that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. The standard also requires an entity to present separately on the face of the income statement or disclose in the notes the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. The Company adopted this pronouncement prospectively beginning January 1, 2016, and the adoption did not have a material effect on the Company’s consolidated financial statements.

Business Combinations

9 Months Ended

Sep. 30, 2016

Business Combinations [Abstract]

BUSINESS COMBINATIONS

As set forth below, the Company completed six acquisitions from January 1, 2015 through September 30, 2016. The Company accounted for each acquisition using the acquisition method of accounting. Accordingly, it recorded the tangible and intangible assets acquired and liabilities assumed at their estimated fair values as of the applicable date of acquisition. For each acquisition, the Company did not incur any material acquisition-related costs.

Peak Provider Solutions Acquisition

On June 3, 2016, the Company completed its acquisition of Peak Provider Solutions (“Peak”), which provides remote medical coding and consulting solutions to hospitals and physician medical groups nationwide. The addition of Peak has expanded the Company’s workforce solutions and enables the Company to offer services in coding diagnosis and procedure codes, which is critical to clinical quality reporting and the financial health of healthcare organizations. The initial purchase price of $52,125 included (1) $51,645 cash consideration paid upon acquisition, funded through cash-on-hand, net of cash received, and borrowings under the Company’s revolving credit facility, and (2) a contingent earn-out payment of up to $3,000 with an estimated fair value of $480 as of the acquisition date. The contingent earn-out payment is based on the operating results of Peak for the year ending December 31, 2016. As the acquisition’s operations are not considered material, pro forma information is not provided. The results of Peak have been included in the Company’s other workforce solutions segment since the date of acquisition. During the third quarter of 2016, an additional $275 of cash consideration was paid to the selling shareholders for the final working capital settlement.

The preliminary allocation of the $52,400 purchase price, which included the additional cash consideration paid for the final working capital settlement, consisted of (1) $5,601 of fair value of tangible assets acquired, (2) $9,568 of liabilities assumed, (3) $19,220 of identified intangible assets, and (4) $37,147 of goodwill, none of which is deductible for tax purposes. The fair value of intangible assets primarily includes $7,600 of trademarks and $11,500 of customer relationships with a weighted average useful life of approximately thirteen years.

HealthSource Global Staffing Acquisition

On January 11, 2016, the Company completed its acquisition of HealthSource Global Staffing (“HSG”), which provides labor disruption and rapid response staffing. The acquisition helps the Company expand its service lines and provide clients with rapid response staffing services. The initial purchase price of $8,367 included (1) $2,655 cash consideration paid upon acquisition, funded through cash-on-hand, net of cash received, and settlement of the pre-existing relationship between AMN and HSG, (2) $2,122 cash holdback for potential indemnification claims, and (3) a tiered contingent earn-out payment of up to $4,000 with an estimated fair value of $3,590 as of the acquisition date. The contingent earn-out payment is comprised of (A) up to $2,000 based on the operating results of HSG for the year ending December 31, 2016, and (B) up to $2,000 based on the operating results of HSG for the year ending December 31, 2017. As the acquisition is not considered material, pro forma information is not provided. The results of HSG have been included in the Company’s nurse and allied solutions segment since the date of acquisition. During the third quarter of 2016, the final working capital settlement resulted in $292 due from the selling shareholders to the Company, which was settled through a reduction to a cash holdback.

The preliminary allocation of the $8,075 purchase price, which was reduced by the final working capital settlement, consisted of (1) $965 of fair value of tangible assets acquired, (2) $5,614 of liabilities assumed, (3) $3,944 of identified intangible assets, and (4) $8,780 of goodwill, none of which is deductible for tax purposes. The intangible assets include the fair value of trademarks, customer relationships, staffing databases, and covenants not to compete with a weighted average useful life of approximately eight years.

B.E. Smith Acquisition

On January 4, 2016, the Company completed its acquisition of B.E. Smith (“BES”), a full-service healthcare interim leadership placement and executive search firm, for $162,232 in cash, net of cash received, and settlement of the pre-existing relationship between AMN and BES. BES places interim leaders and executives across all healthcare settings, including acute care hospitals, academic medical and children’s hospitals, physician practices, and post-acute care providers. The acquisition provides the Company additional access to healthcare executives and enhances its integrated services to hospitals, health systems, and other healthcare facilities across the nation. To help finance the acquisition, the Company entered into the First Amendment to the Credit Agreement (the “First Amendment”), which provided $125,000 of additional available borrowings to the Company. The First Amendment is more fully described in Note (7), “Notes Payable and Credit Agreement.” The results of BES have been included in the Company’s other workforce solutions segment since the date of acquisition. During the second quarter of 2016, $524 was returned to the Company for the final working capital settlement.

The preliminary allocation of the $161,708 purchase price, which was reduced by the final working capital settlement, consisted of (1) $11,953 of fair value of tangible assets acquired, (2) $6,739 of liabilities assumed, (3) $65,900 of identified intangible assets, and (4) $90,594 of goodwill, most of which is deductible for tax purposes. The intangible assets acquired have a weighted average useful life of approximately fifteen years. The following table summarizes the fair value and useful life of each intangible asset acquired:



		Fair Value	Useful Life
			(in years)
Identifiable intangible assets
	Tradenames and Trademarks	$26,300	20
	Customer Relationships	25,700	12
	Staffing Database	13,000	10
	Non-Compete Agreements	900	5
		$65,900

Approximately $27,149 of revenue and $3,950 of income before income taxes of BES were included in the unaudited condensed consolidated statement of comprehensive income for the three months ended September 30, 2016. Approximately $81,246 of revenue and $10,910 of income before income taxes of BES were included in the unaudited condensed consolidated statement of comprehensive income for the nine months ended September 30, 2016. The following summary presents unaudited pro forma consolidated results of operations of the Company for the three and nine months ended September 30, 2015 as if the BES acquisition had occurred on January 1, 2015, which gives effect to certain adjustments, including the reduction of compensation expense related to non-recurring executive salary expense and the addition of acquisition-related costs and amortization of intangible assets. The pro forma financial information is not necessarily indicative of the operating results that would have occurred had the acquisition been consummated as of the date indicated, nor is it necessarily indicative of our future operating results.



	Three Months Ended September 30, 2015		Nine Months Ended September 30, 2015
Revenue	$	407,172	$	1,127,939
Income from operations	$	39,172	$	96,071
Net income	$	32,947	$	60,810
Net income per common share:
Basic	$	0.69	$	1.28
Diluted	$	0.67	$	1.25

MillicanSolutions Acquisition

On October 5, 2015, the Company acquired MillicanSolutions (“Millican”), a physician and executive leadership search firm. The total purchase price of $3,985 included (1) $2,985 cash consideration paid upon acquisition, funded by cash-on-hand, (2) $500 to be paid on December 31, 2016, and (3) $500 to be paid on December 31, 2017. The acquisition enhances the Company’s ability to respond to the specialized leadership needs within academic pediatrics and children’s medical centers and expands its expertise in serving academic medical centers and teaching hospitals in physician and leadership search. As the acquisition is not considered material, pro forma information is not provided. The results of operations of Millican have been included in the Company’s other workforce solutions segment since the date of acquisition.

The preliminary allocation of the $3,985 purchase price consisted of (1) $261 of fair value of tangible assets acquired, (2) $287 of liabilities assumed, (3) $645 of identified intangible assets, and (4) $3,366 of goodwill, a portion of which is deductible for tax purposes. The intangible assets include the fair value of tradenames and trademarks, staffing databases, customer relationships, and a covenant not to compete. The weighted average useful life of the acquired intangible assets subject to amortization is approximately five years.

The First String Healthcare Acquisition

On September 15, 2015, the Company completed its acquisition of The First String Healthcare (“TFS”), a leading provider of interim staffing and permanent placement of nurse leaders and executives. The total purchase price of $7,653 included (1) $4,453 cash consideration paid upon acquisition, funded by cash-on-hand, net of cash received, (2) $500 to be paid on the first anniversary of the acquisition date, which was paid during the three months ended September 30, 2016, and (3) a contingent earn-out with a fair value of $2,700 as of the acquisition date. Also, the purchase agreement included an additional $1,000 payment to be paid on the second anniversary of the acquisition date conditioned upon, subject to certain exceptions, continued employment of the selling shareholders, which is being recorded as compensation expense for post-combination services. The acquisition enhances the Company’s capabilities to provide interim and permanent nursing leadership. As the acquisition is not considered material, pro forma information is not provided. The results of operations of TFS are included in the other workforce solutions segment since the date of acquisition.

The acquisition agreement provides for a tiered contingent earn-out payment of up to $4,000, of which (1) $1,000 was paid to the sellers in March 2016 based on the operating results of TFS for the twelve months ended December 31, 2015, and (2) up to $3,000 may be paid in 2017 based on the operating results of TFS for the twelve months ending December 31, 2016. The allocation of the $7,653 purchase price consisted of (A) $919 of fair value of tangible assets acquired, (B) $891 of liabilities assumed, (C) $3,373 of identified intangible assets, and (D) $4,252 of goodwill, which is deductible for tax purposes. The intangible assets include the fair value of tradenames and trademarks, customer relationships, a staffing database, and covenants not to compete. The weighted average useful life of the acquired intangible assets subject to amortization is approximately seven years.

Onward Healthcare Acquisition

On January 7, 2015, the Company completed its acquisition of Onward Healthcare, including its two wholly-owned subsidiaries, Locum Leaders and Medefis (collectively, “OH”), for approximately $76,643 in cash, funded by cash-on-hand and borrowings under the Company’s revolving credit facility. Onward Healthcare is a national nurse and allied healthcare staffing firm, Locum Leaders is a national locum tenens provider, and Medefis is a provider of a software-as-a-service (“SaaS”)-based vendor management system for healthcare facilities. The acquisition helps the Company to expand its service lines and its supply and placement capabilities of healthcare professionals to its clients. The results of Onward Healthcare are included in the Company’s nurse and allied solutions segment, the results of Locum Leaders are included in the Company’s locum tenens solutions segment, and the results of Medefis are included in the Company’s other workforce solutions segment, in each case, since the date of acquisition.

The allocation of the $76,643 purchase price consisted of (1) $25,216 of fair value of tangible assets acquired (including $21,313 of accounts receivable), (2) $22,275 of liabilities assumed (including $11,113 of accounts payable and accrued expenses), (3) $30,219 of identified intangible assets, and (4) $43,483 of goodwill, a portion of which is deductible for tax purposes. The intangible assets include the fair value of tradenames and trademarks, customer relationships, staffing database, acquired technologies, and non-compete agreements. The weighted average useful life of the acquired intangible assets is approximately eleven years. The following table summarizes the fair value and useful life of each intangible asset acquired:



		Fair Value		Useful Life
				(in years)
Identifiable intangible assets
	Tradenames and Trademarks	$	8,100	3 - 15
	Customer Relationships	17,600		10 - 15
	Staffing Database	2,600		5
	Acquired Technologies	1,700		8
	Non-Compete Agreements	219		2
		$	30,219

Of the $43,483 allocated to goodwill, $23,032, $5,241, and $15,210 were allocated to the Company’s nurse and allied solutions, locum tenens solutions, and other workforce solutions segments, respectively.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

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+ Details

Revenue Recognition	9 Months Ended
Revenue Recognition	Sep. 30, 2016
Revenue Recognition [Abstract]
REVENUE RECOGNITION	REVENUE RECOGNITION Revenue consists of fees earned from the temporary and permanent placement of healthcare professionals and executives as well as from the Company’s SaaS-based technology, including its vendor management systems and its scheduling software. Revenue from temporary staffing services is recognized as the services are rendered by the healthcare professional or executive. Under the Company’s managed services program arrangements, the Company manages all or a part of a customer’s supplemental workforce needs utilizing its own pool of healthcare professionals along with those of third-party subcontractors. When the Company uses subcontractors, revenue is recorded net of the related subcontractor’s expense. Payables to subcontractors of $45,126 and $56,177 were included in accounts payable and accrued expenses in the unaudited condensed consolidated balance sheet as of September 30, 2016 and the audited consolidated balance sheet as of December 31, 2015, respectively. Revenue from recruitment and permanent placement services is recognized as the services are provided and upon successful placements. The Company’s SaaS-based revenue is recognized ratably over the applicable arrangement’s service period. Fees billed in advance of being earned are recorded as deferred revenue.

Net Income Per Common Share

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

NET INCOME PER COMMON SHARE

Basic net income per common share is calculated by dividing net income by the weighted average number of common shares outstanding during the reporting period. The following table sets forth the computation of basic and diluted net income per common share for the three months and nine months ended September 30, 2016 and 2015, respectively:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Net income	$	27,296	$	33,647	$	79,487	$	61,726

Net income per common share - basic	$	0.57	$	0.71	$	1.66	$	1.30
Net income per common share - diluted	$	0.55	$	0.69	$	1.61	$	1.27

Weighted average common shares outstanding - basic	48,049		47,674		47,993		47,466
Plus dilutive effect of potential common shares	1,361		1,304		1,294		1,271
Weighted average common shares outstanding - diluted	49,410		48,978		49,287		48,737

Share-based awards to purchase eleven shares of common stock were not included in the above calculation of diluted net income per common share for the three months ended September 30, 2016 because the effect of these instruments was anti-dilutive. Share-based awards to purchase eighteen and twelve shares of common stock were not included in the above calculation of diluted net income per common share for the nine months ended September 30, 2016 and 2015, respectively, because the effect of these instruments was anti-dilutive.

Segment Information

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

SEGMENT INFORMATION

The Company’s operating segments are identified in the same manner as they are reported internally and used by the Company’s chief operating decision maker for the purpose of evaluating performance and allocating resources. Effective as of January 1, 2016, the Company modified its reportable segments. The Company previously utilized three reportable segments, which it identified as follows: (1) nurse and allied healthcare staffing, (2) locum tenens staffing, and (3) physician permanent placement services. In light of the Company’s acquisitions over the past several years as well as its transition to a healthcare workforce solutions company, the Company’s management renamed its three reportable segments and also placed several of its business lines that were in the nurse and allied healthcare staffing segment into a different segment to better reflect how the business is evaluated by the chief operating decision maker. As of January 1, 2016, the Company began to disclose the following three reportable segments: (1) nurse and allied solutions, (2) locum tenens solutions, and (3) other workforce solutions. The nurse and allied solutions segment consists of the Company’s nurse, allied, and local staffing businesses. The locum tenens solutions segment consists of the Company’s locum tenens staffing business. The other workforce solutions segment consists of the Company’s (i) physician permanent placement services business, (ii) healthcare interim leadership staffing and executive search services business, (iii) vendor management systems business, (iv) recruitment process outsourcing business, (v) education business, (vi) medical coding and related consulting business, and (vii) workforce optimization services business.

The Company’s chief operating decision maker relies on internal management reporting processes that provide revenue and operating income by reportable segment for making financial decisions and allocating resources. Segment operating income represents income before income taxes plus depreciation, amortization of intangible assets, share-based compensation, interest expense, net, and other, and unallocated corporate overhead. The Company’s management does not evaluate, manage or measure performance of segments using asset information; accordingly, asset information by segment is not prepared or disclosed.

The following table, which includes reclassified prior period data to conform to the new segment reporting structure, provides a reconciliation of revenue and operating income by reportable segment to consolidated results and was derived from each segment’s internal financial information as used for corporate management purposes:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Revenue
Nurse and allied solutions	$	286,810	$	246,748	$	877,197	$	690,234
Locum tenens solutions	108,553		101,755		320,420		285,835
Other workforce solutions	77,273		34,356		216,750		84,444
	$	472,636	$	382,859	$	1,414,367	$	1,060,513
Segment operating income
Nurse and allied solutions	$	37,396	$	32,354	$	118,517	$	90,875
Locum tenens solutions	14,026		13,321		43,634		34,142
Other workforce solutions	20,867		13,074		56,311		28,397
	72,289		58,749		218,462		153,414
Unallocated corporate overhead	15,113		13,817		45,908		38,681
Depreciation and amortization	7,789		5,304		21,888		15,631
Share-based compensation	2,704		2,021		8,795		6,551
Interest expense, net, and other	3,016		2,013		9,065		5,797
Income before income taxes	$	43,667	$	35,594	$	132,806	$	86,754

The following table summarizes the activity related to the carrying value of goodwill by reportable segment:



	Nurse and Allied Solutions		Locum Tenens Solutions		Other Workforce Solutions		Total
Balance, January 1, 2016	$	95,309	$	19,743	$	89,727	$	204,779
Goodwill from BES acquisition	—		—		90,594		90,594
Goodwill from HSG acquisition	8,780		—		—		8,780
Goodwill from Peak acquisition	—		—		37,147		37,147
Goodwill adjustment for OH acquisition	850		—		—		850
Goodwill adjustment for TFS acquisition	—		—		24		24
Balance, September 30, 2016	$	104,939	$	19,743	$	217,492	$	342,174
Accumulated impairment loss as of December 31, 2015 and September 30, 2016	$	154,444	$	53,940	$	6,555	$	214,939

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details

Derivative Instruments	9 Months Ended
Derivative Instruments	Sep. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS	DERIVATIVE INSTRUMENTS In April 2015, the Company entered into an interest rate swap agreement to minimize its exposure to interest rate fluctuations on $100,000 of its outstanding variable rate debt under one of its term loans whereby the Company pays a fixed rate of 0.983% per annum and receives a variable rate equal to floating one-month LIBOR. This agreement expires on March 30, 2018, and no initial investment was made to enter into this agreement. At September 30, 2016, the interest rate swap agreement had a fair value of $(396), which is included in other long-term liabilities in the accompanying unaudited condensed consolidated balance sheet as of September 30, 2016. At December 31, 2015, the interest rate swap agreement had a fair value of $165, which was included in other assets in the audited consolidated balance sheet as of December 31, 2015. The Company has formally documented the hedging relationship and accounts for this arrangement as a cash flow hedge. The Company recognizes all derivatives on the balance sheet at fair value based on quotes from an independent pricing service. Gains or losses resulting from changes in the values of the arrangement are recorded in other comprehensive income (loss), net of tax, until the hedged item is recognized in earnings. The Company also formally assesses, both at the hedge’s inception and on an ongoing basis, whether the derivative instrument that is used in the hedging transaction is highly effective in offsetting changes in fair values or cash flows of the hedged item. When it is determined that a derivative instrument is not highly effective as a hedge or that it has ceased to be a highly effective hedge, the Company discontinues hedge accounting prospectively and recognizes subsequent changes in market value in earnings. In connection with the Company’s issuance of $325,000 aggregate principal amount of 5.125% Senior Notes due 2024 (the “Notes”) and the use of a portion of the proceeds thereof to repay $138,438 of certain of its term loan indebtedness on October 3, 2016, the Company reduced the interest rate swap notional amount to $40,000. As the reduction of the notional amount occurred subsequent to the end of the third quarter, there has been no impact on the valuation of the hedge as of September 30, 2016. In addition, the impact of the reduction in notional amount is expected to be immaterial for the fourth quarter. See additional information in Note (12), “Subsequent Events.”

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

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+ Details

Notes Payable and Credit Agreement	9 Months Ended
Notes Payable and Credit Agreement	Sep. 30, 2016
Debt Disclosure [Abstract]
NOTES PAYABLE AND CREDIT AGREEMENT	NOTES PAYABLE AND CREDIT AGREEMENT On April 18, 2014, the Company entered into a Credit Agreement (the “Credit Agreement”) with several lenders to provide for two credit facilities to replace its prior credit facilities, including (1) a $225,000 secured revolving credit facility (the “Revolver”) that includes a $40,000 sublimit for the issuance of letters of credit and a $20,000 sublimit for swingline loans and (2) a $150,000 secured term loan credit facility (the “Term Loan”). On January 4, 2016, the Company entered into the First Amendment (together with the Credit Agreement and the Second Amendment (as defined elsewhere in this Note (7)), the “Amended Credit Agreement”) with several lenders to provide for, among other things, (A) a $50,000 increase to the Revolver to $275,000, and (B) an additional $75,000 secured term loan (the “Additional Term Loan”). The Company used the proceeds from the Additional Term Loan and drawdowns of the Revolver to complete its acquisitions of BES and Peak, as more fully described in Note (2), “Business Combinations.” The Additional Term Loan is subject to amortization of principal of 5.00% per year of the original Additional Term Loan amount, payable in equal quarterly installments. The maturity date of the Additional Term Loan is January 4, 2021. On September 19, 2016, the Company entered into the Second Amendment to the Credit Agreement (the “Second Amendment”), which, among other things, permits the Company to increase the commitments that may be obtained under the Amended Credit Agreement by the amount of certain prepayments made thereunder. Accordingly, the Amended Credit Agreement now provides that the Company may from time to time obtain an increase in the Revolver or obtain additional term loans or both in an aggregate principal amount not to exceed $125,000 plus the amount of certain prepayments of credit facilities thereunder (including $138,438 of prepayments of the Term Loan and the Additional Term Loan made by the Company on October 3, 2016) subject to, among other conditions, the arrangement of additional commitments with financial institutions reasonably acceptable to the Company and the administrative agent. The obligations of the Company under the Amended Credit Agreement are secured by substantially all of the assets of the Company and the common stock or equity interests of its domestic subsidiaries. The payment obligations under the Amended Credit Agreement may be accelerated upon the occurrence of defined events of default. Additionally, the Amended Credit Agreement no longer requires (as was originally set forth in the original Credit Agreement) the Company to make mandatory prepayments under any of the credit facilities provided thereunder with the proceeds of extraordinary receipts and excess cash flow. The Amended Credit Agreement contains various customary affirmative and negative covenants, including restrictions on incurrence of additional indebtedness, declaration and payment of dividends, dispositions of assets, consolidation into another entity, and allowable investments. Additionally, there are financial covenants based on the Company’s consolidated leverage ratio and interest coverage ratio as calculated in accordance with the Amended Credit Agreement. In connection with the First Amendment, the Company incurred $632 in fees paid to lenders and other third parties, of which $448 was capitalized and amortized to interest expense over the remaining term of the Amended Credit Agreement and the remaining amount was recorded as interest expense during the nine months ended September 30, 2016. The Company incurred de minimis costs in connection with the Second Amendment. The Company described in further detail other aspects of the Amended Credit Agreement in effect prior to the Second Amendment in “Item 8. Financial Statements and Supplementary Data—Notes to Consolidated Financial Statements—Note (8), Notes Payable and Credit Agreement” of the 2015 Annual Report. As of September 30, 2016, except for the $3,750 scheduled annual payment under the Additional Term Loan, all outstanding balances under the Revolver, the Term Loan and the Additional Term Loan were classified as long-term payments due to the post-balance sheet date issuance of the Notes on October 3, 2016.

Fair Value Measurement

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENT

The Company’s valuation techniques and inputs used to measure fair value and the definition of the three levels (Level 1, Level 2, and Level 3) of the fair value hierarchy are disclosed in Part II, Item 8, “Financial Statements and Supplementary Data—Notes to Consolidated Financial Statements—Note 4—Fair Value Measurement” of the 2015 Annual Report. The Company has not changed the valuation techniques or inputs it uses for its fair value measurement during the nine months ended September 30, 2016.

Assets and Liabilities Measured on a Recurring Basis

The Company’s restricted cash equivalents that serve as collateral for the Company’s outstanding letters of credit

typically consist of money market funds that are measured at fair value based on quoted prices, which are Level 1 inputs.

As of September 30, 2016, the Company’s restricted cash equivalents and investments that serve as collateral for the Company’s captive insurance company primarily consist of commercial paper that is measured at observable market prices for identical securities that are traded in less active markets, which are Level 2 inputs. Of the $20,989 commercial paper as of September 30, 2016, $1,996 had original maturities greater than three months, which were considered available for sale securities. The Company did not have commercial paper as of December 31, 2015.

The Company’s interest rate swap is measured at fair value using a discounted cash flow analysis that includes the contractual terms, including the period to maturity, and Level 2 observable market-based inputs, including interest rate curves. The fair value of the swap is determined by netting the discounted future fixed cash receipts payments and the discounted expected variable cash receipts. The variable cash receipts are based on an expectation of future interest rates (forward curves) derived from observable market interest rate yield curves. The valuation also considers credit risk adjustments that are necessary to reflect the probability of default by the counterparty or the Company, which are considered Level 3 inputs; however, as of September 30, 2016, the credit risk adjustments, including nonperformance risk, were considered insignificant to the total fair value of the interest rate swap.

The Company’s contingent consideration liabilities are measured at fair value using probability-weighted discounted cash flow analysis for the acquired companies, which are Level 3 inputs.

The following tables present information about the above-referenced assets and liabilities and indicate the fair value hierarchy of the valuation techniques utilized to determine such fair value:



	Fair Value Measurements as of September 30, 2016
	Total			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Money market funds	$	5,627		$	5,627	$	—		$	—
Commercial paper	20,989			—		20,989			—
Interest rate swap liability	(396		)	—		(396		)	—
Acquisition contingent consideration earn-out liabilities	(6,752		)	—		—			(6,752		)



	Fair Value Measurements as of December 31, 2015
	Total			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Money market funds	$	5,627		$	5,627	$	—	$	—
Interest rate swap asset	165			—		165		—
Acquisition contingent consideration earn-out liabilities	(3,770		)	—		—		(3,770		)

Level 3 Information

The following tables set forth reconciliations of changes in the fair value of contingent consideration liabilities classified as Level 3 in the fair value hierarchy:



	Three Months Ended September 30,
	2016			2015
Balance as of July 1,	$	(7,054	)	$	(1,400	)
Change in fair value of contingent consideration earn-out liability from Avantas acquisition	—			300
Contingent consideration earn-out liability from TFS acquisition on September 15, 2015	—			(2,700		)
Change in fair value of contingent consideration earn-out liability from TFS acquisition	(94		)	—
Change in fair value of contingent consideration earn-out liability from HSG acquisition	(84		)	—
Change in fair value of contingent consideration earn-out liability from Peak acquisition	480			—
Balance as of September 30,	$	(6,752	)	$	(3,800	)



	Nine Months Ended September 30,
	2016			2015
Balance as of January 1,	$	(3,770	)	$	(1,400	)
Contingent consideration earn-out liability from TFS acquisition on September 15, 2015	—			(2,700		)
Settlement of TFS earn-out for year ended December 31, 2015	1,000			—
Contingent consideration earn-out liability from HSG acquisition on January 11, 2016	(3,590		)	—
Change in fair value of contingent consideration earn-out liability from Avantas acquisition	660			300
Change in fair value of contingent consideration earn-out liability from TFS acquisition	(859		)	—
Change in fair value of contingent consideration earn-out liability from HSG acquisition	(193		)	—
Contingent consideration earn-out liability from Peak acquisition on June 3, 2016	(480		)	—
Change in fair value of contingent consideration earn-out liability from Peak acquisition	480			—
Balance as of September 30,	$	(6,752	)	$	(3,800	)

Assets Measured on a Non-Recurring Basis

The Company applies fair value techniques on a non-recurring basis associated with valuing potential impairment losses related to its goodwill, indefinite-lived intangible assets, long-lived assets, and equity method investment.

The Company evaluates goodwill and indefinite-lived intangible assets annually for impairment and whenever circumstances occur indicating that goodwill might be impaired. The Company determines the fair value of its reporting units based on a combination of inputs, including the market capitalization of the Company, as well as Level 3 inputs such as discounted cash flows, which are not observable from the market, directly or indirectly. The Company determines the fair value of its indefinite-lived intangible assets using the income approach (relief-from-royalty method) based on Level 3 inputs.

There were no triggering events identified and no indication of impairment of the Company’s goodwill, indefinite-lived intangible assets, long-lived assets, or equity method investment during the nine months ended September 30, 2016 and 2015.

Fair Value of Financial Instruments

The carrying amount of the Company’s notes payable and revolving credit facility approximate their fair value as the instruments’ interest rates are variable and comparable to rates currently offered for similar debt instruments of comparable maturity. The fair value of the Company’s long-term self-insurance accruals cannot be estimated as the Company cannot reasonably determine the timing of future payments.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Income Taxes	9 Months Ended
Income Taxes	Sep. 30, 2016
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The Company is subject to taxation in the U.S. and various states and foreign jurisdictions. With few exceptions, as of September 30, 2016, the Company is no longer subject to state, local, or foreign examinations by tax authorities for tax years before 2006, and the Company is no longer subject to U.S. federal income or payroll tax examinations for tax years before 2011. The Company’s tax years 2007, 2008, 2009 and 2010 had been under audit by the Internal Revenue Service (“IRS”) for several years and in 2014, the IRS issued the Company its Revenue Agent Report (“RAR”) and an Employment Tax Examination Report (“ETER”). The RAR proposed adjustments to the Company’s taxable income for tax years 2007-2010 and net operating loss carryforwards for 2005 and 2006, resulting from the proposed disallowance of certain per diems paid to the Company’s healthcare professionals, and the ETER proposed assessments for additional payroll tax liabilities and penalties for tax years 2009 and 2010 related to the Company’s treatment of certain non-taxable per diem allowances and travel benefits. The positions in the RAR and ETER were mutually exclusive, and contained multiple tax positions, some of which were contrary to each other. The Company filed a Protest Letter for both the RAR and ETER positions in 2014 and the Company received a final determination from the IRS in July 2015 on both the RAR adjustments and ETER assessments, effectively settling these audits with the IRS for $7,200 (including interest) during the third quarter of 2015. As a result of the settlement, the Company recorded federal income tax benefits of approximately $12,200 during the quarter ended September 30, 2015, state income tax benefits (net of federal tax impact) of $568 during the quarter ended September 30, 2016 and expects to record the remaining state income tax benefits (net of federal tax impact) of approximately $1,200 by fiscal year 2019, when the various state statutes are projected to lapse. The IRS conducted and completed a separate audit of the Company’s 2011 and 2012 tax years that focused on income and employment tax issues similar to those raised in the 2007 through 2010 examination. The IRS completed its audit during the quarter ended March 31, 2015, and issued its RAR and ETER to the Company with proposed adjustments to the Company’s taxable income for 2011 and 2012 and net operating loss carryforwards from 2010 and assessments for additional payroll tax liabilities and penalties for 2011 and 2012 related to the Company’s treatment of certain non-taxable per diem allowances and travel benefits. The positions in the RAR and ETER for the 2011 and 2012 years are mutually exclusive and contain multiple tax positions, some of which are contrary to each other. The Company filed a Protest Letter for both the RAR and ETER in April 2015 and the matter is currently at IRS Appeals. The Company recently held its first meeting with the IRS Appeals office and will continue to meet with the IRS Appeals office during the next twelve months. The Company cannot predict with certainty the timing of a resolution of such matter. The IRS began an audit of the Company’s 2013 tax year during the quarter ended June 30, 2015. The Company believes its reserve for unrecognized tax benefits and contingent tax issues is adequate with respect to all open years. Notwithstanding the foregoing, the Company could adjust its provision for income taxes and contingent tax liability based on future developments.

Commitments and Contingencies: Legal	9 Months Ended
Commitments and Contingencies: Legal	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES: LEGAL	COMMITMENTS AND CONTINGENCIES: LEGAL From time to time, the Company is involved in various lawsuits, claims, investigations, and proceedings that arise in the ordinary course of business. These matters typically relate to professional liability, tax, payroll, contract, and employee-related matters and include individual and collective lawsuits, as well as inquiries and investigations by governmental agencies regarding the Company’s employment practices. Additionally, some of the Company’s clients may also become subject to claims, governmental inquiries and investigations, and legal actions relating to services provided by the Company’s healthcare professionals. Depending upon the particular facts and circumstances, the Company may also be subject to indemnification obligations under its contracts with such clients relating to these matters. The Company records a liability when management believes an adverse outcome from a loss contingency is both probable and the amount, or a range, can be reasonably estimated. Significant judgment is required to determine both probability of loss and the estimated amount. The Company reviews its loss contingencies at least quarterly and adjusts its accruals and/or disclosures to reflect the impact of negotiations, settlements, rulings, advice of legal counsel, or other new information, as deemed necessary. The most significant matters in which the Company is currently involved are class actions related to wage and hour claims. Management currently believes the probable loss related to these wage and hour claims is not significant and the amount accrued by the Company for such claims is not material as of September 30, 2016. However, losses ultimately incurred for such claims could materially differ from amounts already accrued by the Company. With regards to outstanding loss contingencies as of September 30, 2016, the Company believes that such matters will not, either individually or in the aggregate, have a material adverse effect on its business, consolidated financial position, results of operations, or cash flows.

Balance Sheet Details

9 Months Ended

Sep. 30, 2016

Balance Sheet Related Disclosures [Abstract]

BALANCE SHEET DETAILS

The consolidated balance sheets detail is as follows as of September 30, 2016 and December 31, 2015:



	September 30, 2016			December 31, 2015
Other current assets:
Restricted cash	$	17,438		$	11,995
Income taxes receivable	288			3,687
Other	12,981			8,041
Other current assets	$	30,707		$	23,723

Fixed assets:
Furniture and equipment	$	27,707		$	23,380
Software	108,892			97,962
Leasehold improvements	6,306			5,472
	142,905			126,814
Accumulated depreciation and amortization	(84,940		)	(76,680		)
Fixed assets, net	$	57,965		$	50,134

Accounts payable and accrued expenses:
Trade accounts payable	$	58,274		$	53,261
Subcontractor payable	45,126			56,177
Professional liability reserve	13,692			7,962
Other	1,197			1,422
Accounts payable and accrued expenses	$	118,289		$	118,822

Accrued compensation and benefits:
Accrued payroll	$	29,709		$	21,058
Accrued bonuses	23,170			24,476
Accrued travel expense	3,582			2,740
Accrued health insurance reserve	3,196			3,225
Accrued workers compensation reserve	8,213			7,701
Deferred compensation	30,147			23,044
Other	1,612			1,457
Accrued compensation and benefits	$	99,629		$	83,701

Other long-term liabilities:
Workers’ compensation reserve	$	18,265		$	16,899
Professional liability reserve	42,672			37,369
Deferred rent	12,784			11,826
Unrecognized tax benefits	8,081			8,081
Other	5,147			3,959
Other long-term liabilities	$	86,949		$	78,134

Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2016
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS 5.125% Senior Notes Due 2024 On October 3, 2016, the Company completed the issuance of $325,000 aggregate principal amount of the Notes, which mature on October 1, 2024. Interest on the Notes is payable semi-annually in arrears on April 1 and October 1 of each year, commencing April 1, 2017. With the proceeds from the Notes and cash generated from operations, the Company (1) repaid $131,250 of existing Term Loan indebtedness, (2) repaid $7,188 of existing Additional Term Loan indebtedness, (3) repaid $182,500 under the Revolver, and (4) paid approximately $6,200 of fees and expenses related to the offering and issuance of the Notes. Share Repurchase Program Authorized On November 1, 2016, the Company’s Board of Directors approved a share repurchase program under which the Company may repurchase up to $150,000 of its outstanding common stock. The amount and timing of the purchases will depend on a number of factors including the price of the Company’s shares, trading volume, Company performance, Company liquidity, general economic and market conditions and other factors that the Company’s management believes are relevant. The share repurchase program does not require the purchase of any minimum number of shares and may be suspended or discontinued at any time. The Company intends to make all repurchases and to administer the plan in accordance with applicable laws and regulatory guidelines, including Rule 10b-18 of the Exchange Act, and in compliance with its debt instruments. Repurchases may be made from cash on hand, free cash flow generated from the Company’s business or from the Company’s credit facilities. Repurchases may be made from time to time through open market purchases or privately negotiated transactions. Repurchases may also be made pursuant to one or more plans established pursuant to Rule 10b5-1 under the Exchange Act, which would permit shares to be repurchased when the Company might otherwise be precluded from doing so under insider trading restrictions.

Basis of Presentation (Policies)	9 Months Ended
Basis of Presentation (Policies)	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Use of Estimates	The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make a number of estimates and assumptions relating to the reporting of assets and liabilities and the disclosure of contingent assets and liabilities at the dates of the financial statements and the reported amounts of revenue and expenses during the reporting periods. On an ongoing basis, the Company evaluates its estimates, including those related to asset impairments, accruals for self-insurance, compensation and related benefits, accounts receivable, contingencies and litigation, earn-out liabilities, and income taxes. Actual results could differ from those estimates under different assumptions or conditions.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In April 2015, the Financial Accounting Standards Board (“FASB”) issued ASU 2015-05, “Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40), Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement.” This standard provides guidance about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the software license element of the arrangement should be accounted for by the customer consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. The Company adopted this pronouncement prospectively beginning January 1, 2016, and the adoption did not have a material effect on the Company’s consolidated financial statements. In September 2015, the FASB issued ASU 2015-16, “Business Combinations - Simplifying the Accounting for Measurement-Period Adjustments.” This standard requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The standard requires that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. The standard also requires an entity to present separately on the face of the income statement or disclose in the notes the portion of the amount recorded in current-period earnings by line item that would have been recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition date. The Company adopted this pronouncement prospectively beginning January 1, 2016, and the adoption did not have a material effect on the Company’s consolidated financial statements.
Revenue Recognition	Revenue consists of fees earned from the temporary and permanent placement of healthcare professionals and executives as well as from the Company’s SaaS-based technology, including its vendor management systems and its scheduling software. Revenue from temporary staffing services is recognized as the services are rendered by the healthcare professional or executive. Under the Company’s managed services program arrangements, the Company manages all or a part of a customer’s supplemental workforce needs utilizing its own pool of healthcare professionals along with those of third-party subcontractors. When the Company uses subcontractors, revenue is recorded net of the related subcontractor’s expense.
Net Income per Common Share	Basic net income per common share is calculated by dividing net income by the weighted average number of common shares outstanding during the reporting period.
Segment Information	The Company’s chief operating decision maker relies on internal management reporting processes that provide revenue and operating income by reportable segment for making financial decisions and allocating resources. Segment operating income represents income before income taxes plus depreciation, amortization of intangible assets, share-based compensation, interest expense, net, and other, and unallocated corporate overhead. The Company’s management does not evaluate, manage or measure performance of segments using asset information; accordingly, asset information by segment is not prepared or disclosed.
Derivative Instruments	The Company recognizes all derivatives on the balance sheet at fair value based on quotes from an independent pricing service. Gains or losses resulting from changes in the values of the arrangement are recorded in other comprehensive income (loss), net of tax, until the hedged item is recognized in earnings. The Company also formally assesses, both at the hedge’s inception and on an ongoing basis, whether the derivative instrument that is used in the hedging transaction is highly effective in offsetting changes in fair values or cash flows of the hedged item. When it is determined that a derivative instrument is not highly effective as a hedge or that it has ceased to be a highly effective hedge, the Company discontinues hedge accounting prospectively and recognizes subsequent changes in market value in earnings.
Fair Value of Financial Instruments	Assets and Liabilities Measured on a Recurring Basis The Company’s restricted cash equivalents that serve as collateral for the Company’s outstanding letters of credit typically consist of money market funds that are measured at fair value based on quoted prices, which are Level 1 inputs. As of September 30, 2016, the Company’s restricted cash equivalents and investments that serve as collateral for the Company’s captive insurance company primarily consist of commercial paper that is measured at observable market prices for identical securities that are traded in less active markets, which are Level 2 inputs. Of the $20,989 commercial paper as of September 30, 2016, $1,996 had original maturities greater than three months, which were considered available for sale securities. The Company did not have commercial paper as of December 31, 2015. The Company’s interest rate swap is measured at fair value using a discounted cash flow analysis that includes the contractual terms, including the period to maturity, and Level 2 observable market-based inputs, including interest rate curves. The fair value of the swap is determined by netting the discounted future fixed cash receipts payments and the discounted expected variable cash receipts. The variable cash receipts are based on an expectation of future interest rates (forward curves) derived from observable market interest rate yield curves. The valuation also considers credit risk adjustments that are necessary to reflect the probability of default by the counterparty or the Company, which are considered Level 3 inputs Fair Value of Financial Instruments The carrying amount of the Company’s notes payable and revolving credit facility approximate their fair value as the instruments’ interest rates are variable and comparable to rates currently offered for similar debt instruments of comparable maturity. The fair value of the Company’s long-term self-insurance accruals cannot be estimated as the Company cannot reasonably determine the timing of future payments. Assets Measured on a Non-Recurring Basis The Company applies fair value techniques on a non-recurring basis associated with valuing potential impairment losses related to its goodwill, indefinite-lived intangible assets, long-lived assets, and equity method investment. The Company evaluates goodwill and indefinite-lived intangible assets annually for impairment and whenever circumstances occur indicating that goodwill might be impaired. The Company determines the fair value of its reporting units based on a combination of inputs, including the market capitalization of the Company, as well as Level 3 inputs such as discounted cash flows, which are not observable from the market, directly or indirectly. The Company determines the fair value of its indefinite-lived intangible assets using the income approach (relief-from-royalty method) based on Level 3 inputs.

Business Combinations (Tables)

9 Months Ended

Sep. 30, 2016

Business Combinations [Abstract]

Summary of Fair Value and Useful Life of Each Intangible Asset Acquired

The following table summarizes the fair value and useful life of each intangible asset acquired:



		Fair Value		Useful Life
				(in years)
Identifiable intangible assets
	Tradenames and Trademarks	$	8,100	3 - 15
	Customer Relationships	17,600		10 - 15
	Staffing Database	2,600		5
	Acquired Technologies	1,700		8
	Non-Compete Agreements	219		2
		$	30,219

The following table summarizes the fair value and useful life of each intangible asset acquired:



		Fair Value	Useful Life
			(in years)
Identifiable intangible assets
	Tradenames and Trademarks	$26,300	20
	Customer Relationships	25,700	12
	Staffing Database	13,000	10
	Non-Compete Agreements	900	5
		$65,900

Business Acquisition, Pro Forma Information

The following summary presents unaudited pro forma consolidated results of operations of the Company for the three and nine months ended September 30, 2015 as if the BES acquisition had occurred on January 1, 2015, which gives effect to certain adjustments, including the reduction of compensation expense related to non-recurring executive salary expense and the addition of acquisition-related costs and amortization of intangible assets. The pro forma financial information is not necessarily indicative of the operating results that would have occurred had the acquisition been consummated as of the date indicated, nor is it necessarily indicative of our future operating results.



	Three Months Ended September 30, 2015		Nine Months Ended September 30, 2015
Revenue	$	407,172	$	1,127,939
Income from operations	$	39,172	$	96,071
Net income	$	32,947	$	60,810
Net income per common share:
Basic	$	0.69	$	1.28
Diluted	$	0.67	$	1.25

Net Income Per Common Share (Tables)

9 Months Ended

Sep. 30, 2016

Earnings Per Share [Abstract]

Computation of basic and diluted net income per common share

The following table sets forth the computation of basic and diluted net income per common share for the three months and nine months ended September 30, 2016 and 2015, respectively:



	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Net income	$	27,296	$	33,647	$	79,487	$	61,726

Net income per common share - basic	$	0.57	$	0.71	$	1.66	$	1.30
Net income per common share - diluted	$	0.55	$	0.69	$	1.61	$	1.27

Weighted average common shares outstanding - basic	48,049		47,674		47,993		47,466
Plus dilutive effect of potential common shares	1,361		1,304		1,294		1,271
Weighted average common shares outstanding - diluted	49,410		48,978		49,287		48,737

Segment Information (Tables)

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Schedule of reconciliation of revenue and segment operating income by reportable segment to consolidated results



	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Revenue
Nurse and allied solutions	$	286,810	$	246,748	$	877,197	$	690,234
Locum tenens solutions	108,553		101,755		320,420		285,835
Other workforce solutions	77,273		34,356		216,750		84,444
	$	472,636	$	382,859	$	1,414,367	$	1,060,513
Segment operating income
Nurse and allied solutions	$	37,396	$	32,354	$	118,517	$	90,875
Locum tenens solutions	14,026		13,321		43,634		34,142
Other workforce solutions	20,867		13,074		56,311		28,397
	72,289		58,749		218,462		153,414
Unallocated corporate overhead	15,113		13,817		45,908		38,681
Depreciation and amortization	7,789		5,304		21,888		15,631
Share-based compensation	2,704		2,021		8,795		6,551
Interest expense, net, and other	3,016		2,013		9,065		5,797
Income before income taxes	$	43,667	$	35,594	$	132,806	$	86,754

Schedule of goodwill

The following table summarizes the activity related to the carrying value of goodwill by reportable segment:



	Nurse and Allied Solutions		Locum Tenens Solutions		Other Workforce Solutions		Total
Balance, January 1, 2016	$	95,309	$	19,743	$	89,727	$	204,779
Goodwill from BES acquisition	—		—		90,594		90,594
Goodwill from HSG acquisition	8,780		—		—		8,780
Goodwill from Peak acquisition	—		—		37,147		37,147
Goodwill adjustment for OH acquisition	850		—		—		850
Goodwill adjustment for TFS acquisition	—		—		24		24
Balance, September 30, 2016	$	104,939	$	19,743	$	217,492	$	342,174
Accumulated impairment loss as of December 31, 2015 and September 30, 2016	$	154,444	$	53,940	$	6,555	$	214,939

Fair Value Measurement (Tables)

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Schedule of financial assets and liabilities measured at fair value on recurring basis

The following tables present information about the above-referenced assets and liabilities and indicate the fair value hierarchy of the valuation techniques utilized to determine such fair value:



	Fair Value Measurements as of September 30, 2016
	Total			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Money market funds	$	5,627		$	5,627	$	—		$	—
Commercial paper	20,989			—		20,989			—
Interest rate swap liability	(396		)	—		(396		)	—
Acquisition contingent consideration earn-out liabilities	(6,752		)	—		—			(6,752		)



	Fair Value Measurements as of December 31, 2015
	Total			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Money market funds	$	5,627		$	5,627	$	—	$	—
Interest rate swap asset	165			—		165		—
Acquisition contingent consideration earn-out liabilities	(3,770		)	—		—		(3,770		)

Reconciliations of changes in the fair value of contingent consideration liabilities

The following tables set forth reconciliations of changes in the fair value of contingent consideration liabilities classified as Level 3 in the fair value hierarchy:



	Three Months Ended September 30,
	2016			2015
Balance as of July 1,	$	(7,054	)	$	(1,400	)
Change in fair value of contingent consideration earn-out liability from Avantas acquisition	—			300
Contingent consideration earn-out liability from TFS acquisition on September 15, 2015	—			(2,700		)
Change in fair value of contingent consideration earn-out liability from TFS acquisition	(94		)	—
Change in fair value of contingent consideration earn-out liability from HSG acquisition	(84		)	—
Change in fair value of contingent consideration earn-out liability from Peak acquisition	480			—
Balance as of September 30,	$	(6,752	)	$	(3,800	)



	Nine Months Ended September 30,
	2016			2015
Balance as of January 1,	$	(3,770	)	$	(1,400	)
Contingent consideration earn-out liability from TFS acquisition on September 15, 2015	—			(2,700		)
Settlement of TFS earn-out for year ended December 31, 2015	1,000			—
Contingent consideration earn-out liability from HSG acquisition on January 11, 2016	(3,590		)	—
Change in fair value of contingent consideration earn-out liability from Avantas acquisition	660			300
Change in fair value of contingent consideration earn-out liability from TFS acquisition	(859		)	—
Change in fair value of contingent consideration earn-out liability from HSG acquisition	(193		)	—
Contingent consideration earn-out liability from Peak acquisition on June 3, 2016	(480		)	—
Change in fair value of contingent consideration earn-out liability from Peak acquisition	480			—
Balance as of September 30,	$	(6,752	)	$	(3,800	)

Balance Sheet Details (Tables)

9 Months Ended

Sep. 30, 2016

Balance Sheet Related Disclosures [Abstract]

Schedule of Supplemental Balance Sheet Disclosures

The consolidated balance sheets detail is as follows as of September 30, 2016 and December 31, 2015:



	September 30, 2016			December 31, 2015
Other current assets:
Restricted cash	$	17,438		$	11,995
Income taxes receivable	288			3,687
Other	12,981			8,041
Other current assets	$	30,707		$	23,723

Fixed assets:
Furniture and equipment	$	27,707		$	23,380
Software	108,892			97,962
Leasehold improvements	6,306			5,472
	142,905			126,814
Accumulated depreciation and amortization	(84,940		)	(76,680		)
Fixed assets, net	$	57,965		$	50,134

Accounts payable and accrued expenses:
Trade accounts payable	$	58,274		$	53,261
Subcontractor payable	45,126			56,177
Professional liability reserve	13,692			7,962
Other	1,197			1,422
Accounts payable and accrued expenses	$	118,289		$	118,822

Accrued compensation and benefits:
Accrued payroll	$	29,709		$	21,058
Accrued bonuses	23,170			24,476
Accrued travel expense	3,582			2,740
Accrued health insurance reserve	3,196			3,225
Accrued workers compensation reserve	8,213			7,701
Deferred compensation	30,147			23,044
Other	1,612			1,457
Accrued compensation and benefits	$	99,629		$	83,701

Other long-term liabilities:
Workers’ compensation reserve	$	18,265		$	16,899
Professional liability reserve	42,672			37,369
Deferred rent	12,784			11,826
Unrecognized tax benefits	8,081			8,081
Other	5,147			3,959
Other long-term liabilities	$	86,949		$	78,134

Business Combinations (Details)											3 Months Ended		9 Months Ended		18 Months Ended
Business Combinations (Details)	Dec. 31, 2017 USD ($)	Sep. 15, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 15, 2016 USD ($)	Jun. 03, 2016 USD ($)	Jan. 11, 2016 USD ($)	Jan. 04, 2016 USD ($)	Oct. 05, 2015 USD ($)	Sep. 15, 2015 USD ($)	Jan. 07, 2015 USD ($) subsidiary	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($) $ / shares	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($) $ / shares	Jun. 30, 2016 aquisition	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Business Acquisition [Line Items]
Number of acquisitions \| aquisition															6
Business Combination, Description
Payments for Previous Acquisition													$ 1,348,000	$ 165,000
Allocation of Purchase Price
Goodwill											$ 342,174,000		342,174,000				$ 204,779,000
Nurse and allied solutions [Member]
Allocation of Purchase Price
Goodwill											104,939,000		104,939,000				95,309,000
Locum tenens solutions [Member]
Allocation of Purchase Price
Goodwill											19,743,000		19,743,000				19,743,000
Other workforce solutions [Member]
Allocation of Purchase Price
Goodwill											217,492,000		217,492,000				$ 89,727,000
Line of Credit [Member]
Business Combination, Description
Maximum borrowing capacity							$ 125,000,000
Peak [Member]
Business Combination, Description
Total purchase price of the acquisition					$ 52,400,000
Cash consideration					51,645,000
Contingent earn-out based on future operating performance					3,000,000
Fair value of contingent earn-out					480,000
Payments for Previous Acquisition											275,000
Allocation of Purchase Price
Fair value of assets acquired					5,601,000
Liabilities assumed					9,568,000
Identified intangible assets					$ 19,220,000
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Weighted average useful life of intangible assets					13 years
Peak [Member] \| Other workforce solutions [Member]
Allocation of Purchase Price
Goodwill					$ 37,147,000
Peak [Member] \| Trademarks [Member]
Allocation of Purchase Price
Identified intangible assets					7,600,000
Peak [Member] \| Customer relationships [Member]
Allocation of Purchase Price
Identified intangible assets					11,500,000
Peak [Member] \| Scenario, Previously Reported [Member]
Business Combination, Description
Total purchase price of the acquisition					$ 52,125,000
HSG [Member]
Business Combination, Description
Total purchase price of the acquisition						$ 8,075,000
Cash consideration						2,655,000
Cash holdback for potential claims						2,122,000
Contingent earn-out based on future operating performance						4,000,000
Fair value of contingent earn-out						3,590,000
Working capital settlement received											292,000
Allocation of Purchase Price
Fair value of assets acquired						965,000
Liabilities assumed						5,614,000
Identified intangible assets						$ 3,944,000
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Weighted average useful life of intangible assets						8 years
HSG [Member] \| Nurse and allied solutions [Member]
Allocation of Purchase Price
Goodwill						$ 8,780,000
HSG [Member] \| Scenario, Previously Reported [Member]
Business Combination, Description
Total purchase price of the acquisition						8,367,000
HSG [Member] \| Earn-Out Payment, Based on Operating Results for 2016 [Member]
Business Combination, Description
Contingent earn-out based on future operating performance						2,000,000
HSG [Member] \| Earn-Out Payment, Based on Operating Results for 2017 [Member]
Business Combination, Description
Contingent earn-out based on future operating performance						$ 2,000,000
BES [Member]
Business Combination, Description
Cash consideration							161,708,000
Working capital settlement received											524,000
Allocation of Purchase Price
Fair value of assets acquired							11,953,000
Liabilities assumed							6,739,000
Identified intangible assets							$ 65,900,000
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Weighted average useful life of intangible assets							15 years
Business Acquisition, Pro Forma Information [Abstract]
Actual acquiree revenue since date of acquisition											27,149,000		81,246,000
Actual acquiree income before income taxes since date of acquisition											$ 3,950,000		$ 10,910,000
Pro forma revenue												$ 407,172,000		1,127,939,000
Pro forma income from operations												39,172,000		96,071,000
Pro forma net income												$ 32,947,000		$ 60,810,000
Net income per common share, basic (in dollars per share) \| $ / shares												$ 0.69		$ 1.28
Net income per common share, diluted (in dollars per share) \| $ / shares												$ 0.67		$ 1.25
BES [Member] \| Other workforce solutions [Member]
Allocation of Purchase Price
Goodwill							$ 90,594,000
BES [Member] \| Tradenames and trademarks [Member]
Allocation of Purchase Price
Identified intangible assets							$ 26,300,000
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Useful life							20 years
BES [Member] \| Customer relationships [Member]
Allocation of Purchase Price
Identified intangible assets							$ 25,700,000
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Useful life							12 years
BES [Member] \| Staffing database [Member]
Allocation of Purchase Price
Identified intangible assets							$ 13,000,000
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Useful life							10 years
BES [Member] \| Noncompete agreements [Member]
Allocation of Purchase Price
Identified intangible assets							$ 900,000
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Useful life							5 years
BES [Member] \| Scenario, Previously Reported [Member]
Business Combination, Description
Cash consideration							$ 162,232,000
Millican Solutions, Inc. [Member]
Business Combination, Description
Total purchase price of the acquisition								$ 3,985,000
Cash consideration								2,985,000
Allocation of Purchase Price
Fair value of assets acquired								261,000
Liabilities assumed								287,000
Identified intangible assets								645,000
Goodwill								$ 3,366,000
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Weighted average useful life of intangible assets								5 years
Millican Solutions, Inc. [Member] \| Scenario, Forecast [Member]
Business Combination, Description
Cash consideration	$ 500,000		$ 500,000
TFS [Member]
Business Combination, Description
Total purchase price of the acquisition									$ 7,653,000
Cash consideration				$ 500,000					4,453,000
Contingent earn-out based on future operating performance									4,000,000
Fair value of contingent earn-out									2,700,000
Allocation of Purchase Price
Fair value of assets acquired									919,000
Liabilities assumed									891,000
Identified intangible assets									3,373,000
Goodwill									$ 4,252,000
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Weighted average useful life of intangible assets									7 years
TFS [Member] \| Scenario, Forecast [Member]
Business Combination, Description
Contingent earn-out future payments		$ 1,000,000
TFS [Member] \| Earn-Out Payment, Based on Operating Results for 2016 [Member] \| Scenario, Forecast [Member]
Business Combination, Description
Contingent earn-out based on future operating performance	$ 3,000,000
TFS [Member] \| Earn-Out Payment, Based on Operating Results for 2015 [Member]
Business Combination, Description
Contingent earn-out based on future operating performance																$ 1,000,000
OH [Member]
Business Combination, Description
Cash consideration										$ 76,643,000
Number of subsidiaries acquired with parent \| subsidiary										2
Allocation of Purchase Price
Fair value of assets acquired										$ 25,216,000
Liabilities assumed										22,275,000
Identified intangible assets										30,219,000
Goodwill										43,483,000
Accounts receivable acquired										21,313,000
Accounts payable assumed										$ 11,113,000
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Weighted average useful life of intangible assets										11 years
OH [Member] \| Nurse and allied solutions [Member]
Allocation of Purchase Price
Goodwill										$ 23,032,000
OH [Member] \| Locum tenens solutions [Member]
Allocation of Purchase Price
Goodwill										5,241,000
OH [Member] \| Other workforce solutions [Member]
Allocation of Purchase Price
Goodwill										15,210,000
OH [Member] \| Tradenames and trademarks [Member]
Allocation of Purchase Price
Identified intangible assets										8,100,000
OH [Member] \| Customer relationships [Member]
Allocation of Purchase Price
Identified intangible assets										17,600,000
OH [Member] \| Staffing database [Member]
Allocation of Purchase Price
Identified intangible assets										$ 2,600,000
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Useful life										5 years
OH [Member] \| Technologies [Member]
Allocation of Purchase Price
Identified intangible assets										$ 1,700,000
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Useful life										8 years
OH [Member] \| Noncompete agreements [Member]
Allocation of Purchase Price
Identified intangible assets										$ 219,000
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Useful life										2 years
OH [Member] \| Minimum [Member] \| Tradenames and trademarks [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Useful life										3 years
OH [Member] \| Minimum [Member] \| Customer relationships [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Useful life										10 years
OH [Member] \| Maximum [Member] \| Tradenames and trademarks [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Useful life										15 years
OH [Member] \| Maximum [Member] \| Customer relationships [Member]
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Useful life										15 years

Revenue Recognition (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Revenue Recognition [Abstract]
Payables to subcontractor	$ 45,126	$ 56,177

Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Computation of basic and diluted net income per common share
Net income	$ 27,296	$ 33,647	$ 79,487	$ 61,726
Net income per common share - basic (in dollars per share)	$ 0.57	$ 0.71	$ 1.66	$ 1.30
Net income per common share - diluted (in dollars per share)	$ 0.55	$ 0.69	$ 1.61	$ 1.27
Weighted average common shares outstanding - basic	48,049,000	47,674,000	47,993,000	47,466,000
Plus dilutive effect of potential common shares	1,361,000	1,304,000	1,294,000	1,271,000
Weighted average common shares outstanding - diluted	49,410,000	48,978,000	49,287,000	48,737,000
Common stock excluded from calculation of EPS	11		18	12

Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
Segment Information (Details) $ in Thousands	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) segment	Sep. 30, 2015 USD ($)
Segment Reporting [Abstract]
Reportable business segments \| segment			3
Schedule of reconciliation of revenue and segment operating income by reportable segment to consolidated results
Revenue	$ 472,636	$ 382,859	$ 1,414,367	$ 1,060,513
Segment operating income	46,683	37,607	141,871	92,551
Depreciation and amortization	7,789	5,304	21,888	15,631
Share-based compensation	2,704	2,021	8,795	6,551
Interest expense, net, and other	3,016	2,013	9,065	5,797
Income before income taxes	43,667	35,594	132,806	86,754
Operating segments [Member]
Schedule of reconciliation of revenue and segment operating income by reportable segment to consolidated results
Revenue	472,636	382,859	1,414,367	1,060,513
Segment operating income	72,289	58,749	218,462	153,414
Operating segments [Member] \| Nurse and allied solutions [Member]
Schedule of reconciliation of revenue and segment operating income by reportable segment to consolidated results
Revenue	286,810	246,748	877,197	690,234
Segment operating income	37,396	32,354	118,517	90,875
Operating segments [Member] \| Locum tenens solutions [Member]
Schedule of reconciliation of revenue and segment operating income by reportable segment to consolidated results
Revenue	108,553	101,755	320,420	285,835
Segment operating income	14,026	13,321	43,634	34,142
Operating segments [Member] \| Other workforce solutions [Member]
Schedule of reconciliation of revenue and segment operating income by reportable segment to consolidated results
Revenue	77,273	34,356	216,750	84,444
Segment operating income	20,867	13,074	56,311	28,397
Unallocated corporate overhead [Member]
Schedule of reconciliation of revenue and segment operating income by reportable segment to consolidated results
Unallocated corporate overhead	$ 15,113	$ 13,817	$ 45,908	$ 38,681

Segment Information - Goodwill (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Beginning balance	$ 204,779
Ending balance	342,174
Accumulated impairment loss	214,939	$ 214,939
BES [Member]
Goodwill [Roll Forward]
Goodwill from acquisition	90,594
HSG [Member]
Goodwill [Roll Forward]
Goodwill from acquisition	8,780
Peak [Member]
Goodwill [Roll Forward]
Goodwill from acquisition	37,147
OH [Member]
Goodwill [Roll Forward]
Goodwill adjustment for acquisition	850
TFS [Member]
Goodwill [Roll Forward]
Goodwill adjustment for acquisition	24
Nurse and allied solutions [Member]
Goodwill [Roll Forward]
Beginning balance	95,309
Ending balance	104,939
Accumulated impairment loss	154,444	154,444
Nurse and allied solutions [Member] \| BES [Member]
Goodwill [Roll Forward]
Goodwill from acquisition	0
Nurse and allied solutions [Member] \| HSG [Member]
Goodwill [Roll Forward]
Goodwill from acquisition	8,780
Nurse and allied solutions [Member] \| Peak [Member]
Goodwill [Roll Forward]
Goodwill from acquisition	0
Nurse and allied solutions [Member] \| OH [Member]
Goodwill [Roll Forward]
Goodwill adjustment for acquisition	850
Nurse and allied solutions [Member] \| TFS [Member]
Goodwill [Roll Forward]
Goodwill adjustment for acquisition	0
Locum tenens solutions [Member]
Goodwill [Roll Forward]
Beginning balance	19,743
Ending balance	19,743
Accumulated impairment loss	53,940	53,940
Locum tenens solutions [Member] \| BES [Member]
Goodwill [Roll Forward]
Goodwill from acquisition	0
Locum tenens solutions [Member] \| HSG [Member]
Goodwill [Roll Forward]
Goodwill from acquisition	0
Locum tenens solutions [Member] \| Peak [Member]
Goodwill [Roll Forward]
Goodwill from acquisition	0
Locum tenens solutions [Member] \| OH [Member]
Goodwill [Roll Forward]
Goodwill adjustment for acquisition	0
Locum tenens solutions [Member] \| TFS [Member]
Goodwill [Roll Forward]
Goodwill adjustment for acquisition	0
Other workforce solutions [Member]
Goodwill [Roll Forward]
Beginning balance	89,727
Ending balance	217,492
Accumulated impairment loss	6,555	$ 6,555
Other workforce solutions [Member] \| BES [Member]
Goodwill [Roll Forward]
Goodwill from acquisition	90,594
Other workforce solutions [Member] \| HSG [Member]
Goodwill [Roll Forward]
Goodwill from acquisition	0
Other workforce solutions [Member] \| Peak [Member]
Goodwill [Roll Forward]
Goodwill from acquisition	37,147
Other workforce solutions [Member] \| OH [Member]
Goodwill [Roll Forward]
Goodwill adjustment for acquisition	0
Other workforce solutions [Member] \| TFS [Member]
Goodwill [Roll Forward]
Goodwill adjustment for acquisition	$ 24

Derivative Instruments (Details) - USD ($)	Oct. 03, 2016	Sep. 30, 2016	Dec. 31, 2015	Apr. 30, 2015
Subsequent Event [Member] \| Senior Notes [Member] \| 5.125% Senior Notes Due 2024 [Member]
Derivative [Line Items]
Aggregate principal amount	$ 325,000,000
Interest rate	5.125%
Subsequent Event [Member] \| Line of Credit [Member]
Derivative [Line Items]
Debt repayments	$ 138,438,000
Interest Rate Swap [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Interest rate swap, face amount				$ 100,000,000
Fixed rate on interest rate swap, percent				0.983%
Interest Rate Swap [Member] \| Designated as Hedging Instrument [Member] \| Subsequent Event [Member]
Derivative [Line Items]
Interest rate swap, face amount	$ 40,000,000
Interest Rate Swap [Member] \| Designated as Hedging Instrument [Member] \| Other Long-time Liabilities [Member]
Derivative [Line Items]
Fair value of interest rate swap liability		$ (396,000)
Interest Rate Swap [Member] \| Designated as Hedging Instrument [Member] \| Other Assets [Member]
Derivative [Line Items]
Fair value of interest rate swap asset			$ 165,000

Notes Payable and Credit Agreement (Details) - Line of Credit [Member]	Oct. 03, 2016 USD ($)	Apr. 18, 2014 USD ($) credit_facility	Sep. 30, 2016 USD ($)	Jan. 04, 2016 USD ($)
Debt Instrument [Line Items]
Number of credit facilities \| credit_facility		2
Maximum borrowing capacity				$ 125,000,000
Potential increase to maximum borrowing capacity				125,000,000
Debt issuance fees incurred				632,000
Debt issuance fees capitalized				448,000
Subsequent Event [Member]
Debt Instrument [Line Items]
Debt repayments	$ 138,438,000
Revolver [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 225,000,000		275,000,000
Increase to maximum borrowing capacity				50,000,000
Revolver [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Debt repayments	182,500,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		40,000,000
Revolving Credit Facility, Swing Line Loan [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		20,000,000
Term Loan [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 150,000,000		$ 75,000,000
Amortization rate as a percent of principal		5.00%
Term Loan [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Debt repayments	131,250,000
Additional Term Loan [Member]
Debt Instrument [Line Items]
Scheduled annual payment			$ 3,750,000
Additional Term Loan [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Debt repayments	$ 7,188,000

Fair Value Measurement - Financial Assets and Liabilities (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Money Market Funds [Member]
Schedule of financial assets and liabilities measured at fair value on recurring basis
Financial assets and liabilities measured at fair value	$ 5,627	$ 5,627
Money Market Funds [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Schedule of financial assets and liabilities measured at fair value on recurring basis
Financial assets and liabilities measured at fair value	5,627	5,627
Money Market Funds [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Schedule of financial assets and liabilities measured at fair value on recurring basis
Financial assets and liabilities measured at fair value	0	0
Money Market Funds [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Schedule of financial assets and liabilities measured at fair value on recurring basis
Financial assets and liabilities measured at fair value	0	0
Commercial Paper [Member]
Schedule of financial assets and liabilities measured at fair value on recurring basis
Financial assets and liabilities measured at fair value	20,989
Commercial Paper [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Schedule of financial assets and liabilities measured at fair value on recurring basis
Financial assets and liabilities measured at fair value	0
Commercial Paper [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Schedule of financial assets and liabilities measured at fair value on recurring basis
Financial assets and liabilities measured at fair value	20,989
Available for sale securities	1,996
Commercial Paper [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Schedule of financial assets and liabilities measured at fair value on recurring basis
Financial assets and liabilities measured at fair value	0
Derivative Financial Instruments, Assets [Member] \| Interest Rate Swap [Member]
Schedule of financial assets and liabilities measured at fair value on recurring basis
Financial assets and liabilities measured at fair value	(396)	165
Derivative Financial Instruments, Assets [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] \| Interest Rate Swap [Member]
Schedule of financial assets and liabilities measured at fair value on recurring basis
Financial assets and liabilities measured at fair value	0	0
Derivative Financial Instruments, Assets [Member] \| Significant Other Observable Inputs (Level 2) [Member] \| Interest Rate Swap [Member]
Schedule of financial assets and liabilities measured at fair value on recurring basis
Financial assets and liabilities measured at fair value	(396)	165
Derivative Financial Instruments, Assets [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Interest Rate Swap [Member]
Schedule of financial assets and liabilities measured at fair value on recurring basis
Financial assets and liabilities measured at fair value	0	0
Contingent Consideration [Member]
Schedule of financial assets and liabilities measured at fair value on recurring basis
Financial assets and liabilities measured at fair value	(6,752)	(3,770)
Contingent Consideration [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Schedule of financial assets and liabilities measured at fair value on recurring basis
Financial assets and liabilities measured at fair value	0	0
Contingent Consideration [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Schedule of financial assets and liabilities measured at fair value on recurring basis
Financial assets and liabilities measured at fair value	0	0
Contingent Consideration [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Schedule of financial assets and liabilities measured at fair value on recurring basis
Financial assets and liabilities measured at fair value	$ (6,752)	$ (3,770)

Fair Value Measurement - Reconciliation of Changes in Contingent Consideration Liabilities (Details) - Fair Value, Inputs, Level 3 [Member] - Contingent Consideration [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ (7,054)	$ (1,400)	$ (3,770)	$ (1,400)
Settlement of TFS earn-out for year ended December 31, 2015			1,000	0
Ending balance	(6,752)	(3,800)	(6,752)	(3,800)
Avantas [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in fair value of contingent consideration earn-out liability from acquisition	0	300	660	300
TFS [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in fair value of contingent consideration earn-out liability from acquisition	(94)	0	(859)	0
Contingent consideration earn-out liability from acquisition	0	(2,700)	0	(2,700)
HSG [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in fair value of contingent consideration earn-out liability from acquisition	(84)	0	(193)	0
Contingent consideration earn-out liability from acquisition			(3,590)	0
Peak [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in fair value of contingent consideration earn-out liability from acquisition	$ 480	$ 0	480	0
Contingent consideration earn-out liability from acquisition			$ (480)	$ 0

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
Income Taxes (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2019	Sep. 30, 2016
Federal Tax Authority [Member]
Income Tax Examination [Line Items]
Income tax benefits to be recorded in connection with settlement	$ 12,200
Federal Tax Authority [Member] \| Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Tax settlement amount	$ 7,200
State Jurisdiction [Member]
Income Tax Examination [Line Items]
Income tax benefits to be recorded in connection with settlement			$ 568
Scenario, Forecast [Member] \| State Jurisdiction [Member]
Income Tax Examination [Line Items]
Income tax benefits to be recorded in connection with settlement		$ 1,200

Balance Sheet Details (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Other current assets:
Restricted cash	$ 17,438	$ 11,995
Income taxes receivable	288	3,687
Other	12,981	8,041
Other current assets	30,707	23,723
Fixed assets:
Furniture and equipment	27,707	23,380
Software	108,892	97,962
Leasehold improvements	6,306	5,472
Fixed assets, gross	142,905	126,814
Accumulated depreciation and amortization	(84,940)	(76,680)
Fixed assets, net	57,965	50,134
Accounts payable and accrued expenses:
Trade accounts payable	58,274	53,261
Subcontractor payable	45,126	56,177
Professional liability reserve	13,692	7,962
Other	1,197	1,422
Accounts payable and accrued expenses	118,289	118,822
Accrued compensation and benefits:
Accrued payroll	29,709	21,058
Accrued bonuses	23,170	24,476
Accrued travel expense	3,582	2,740
Accrued health insurance reserve	3,196	3,225
Accrued workers compensation reserve	8,213	7,701
Deferred compensation	30,147	23,044
Other	1,612	1,457
Accrued compensation and benefits	99,629	83,701
Other long-term liabilities:
Workers’ compensation reserve	18,265	16,899
Professional liability reserve	42,672	37,369
Deferred rent	12,784	11,826
Unrecognized tax benefits	8,081	8,081
Other	5,147	3,959
Other long-term liabilities	$ 86,949	$ 78,134

Subsequent Events (Details) - Subsequent Event [Member] - USD ($)	Oct. 03, 2016	Nov. 01, 2016
Subsequent Event [Line Items]
Share repurchase authorization amount (up to)		$ 150,000,000
Line of Credit [Member]
Subsequent Event [Line Items]
Debt repayments	$ 138,438,000
Line of Credit [Member] \| Term Loan [Member]
Subsequent Event [Line Items]
Debt repayments	131,250,000
Line of Credit [Member] \| Additional Term Loan [Member]
Subsequent Event [Line Items]
Debt repayments	7,188,000
Line of Credit [Member] \| Revolver [Member]
Subsequent Event [Line Items]
Debt repayments	$ 182,500,000
5.125% Senior Notes Due 2024 [Member] \| Senior Notes [Member]
Subsequent Event [Line Items]
Interest rate	5.125%
Aggregate principal amount	$ 325,000,000
Fees and expenses related to offering and issuance of debt	$ 6,200,000