ASGN (ASGN) 10-Q 6 Nov 15 2015 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Nov. 02, 2015
Entity Information [Line Items]
Entity Registrant Name	ON ASSIGNMENT INC
Entity Central Index Key	890,564
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		52,798,906

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash	$ 28,916	$ 28,860
Accounts receivable, net of allowance of $5,908 and $4,404, respectively	358,649	277,146
Prepaid expenses and income taxes	6,526	13,308
Deferred income tax assets	15,298	15,746
Workers' compensation receivable	13,737	13,370
Other current assets	8,978	2,310	[1]
Disposal Group, Including Discontinued Operation, Assets, Current	0	34,353
Total current assets	432,104	385,093
Property and equipment, net	51,767	44,311
Goodwill	875,714	512,060
Identifiable intangible assets, net	429,621	250,609
Other non-current assets	7,594	5,160	[1]
Disposal Group, Including Discontinued Operation, Assets, Noncurrent	0	73,673
Total Assets	1,796,800	1,270,906
Current liabilities:
Current portion of long-term debt, net	0	17,439	[1]
Accounts payable	6,686	7,925
Accrued payroll and contract professional pay	113,219	82,563
Workers’ compensation loss reserves	15,603	15,564
Income taxes payable	7,423	340
Other current liabilities	39,218	20,729
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	20,195
Total current liabilities	182,149	164,755
Deferred income tax liabilities	66,142	63,821
Long-term debt, net	784,797	394,418	[1]
Other long-term liabilities	5,124	7,937
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent	0	5,567
Total liabilities	$ 1,038,212	$ 636,498
Commitments and contingencies (Note 7)
Stockholders’ equity:
Preferred stock, $0.01 par value, 1,000,000 shares authorized, no shares issued	$ 0	$ 0
Common stock, $0.01 par value, 75,000,000 shares authorized, 52,773,326 and 51,386,693 issued and outstanding, respectively	528	514
Paid-in capital	533,480	483,902
Retained earnings	231,634	154,562
Accumulated other comprehensive loss	(7,054)	(4,570)
Total stockholders’ equity	758,588	634,408
Total Liabilities and Stockholders’ Equity	$ 1,796,800	$ 1,270,906
[1]	The December 31, 2014 balances have been adjusted to reflect unamortized deferred loan costs attributable to term loans as a reduction of the related debt balances whereas they were previously included in other current assets and other non-current assets. This change in presentation was the result of the early adoption of ASU 2015-03. The December 31, 2014 balances for long-term debt and the current portion of long-term debt are now reflected net of $2.5 million and $0.8 million of unamortized deferred loan costs, respectively.

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Accounts receivable, allowance	$ 5,908	$ 4,404
Stockholders’ equity:
Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred Stock, shares issued (in shares)	0	0
Preferred Stock, shares outstanding (in shares)	0	0
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized (in shares)	75,000,000	75,000,000
Common Stock, shares issued (in shares)	52,773,326	51,386,693
Common Stock: shares outstanding (in shares)	52,773,326	51,386,693

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues	$ 572,123	$ 442,443	$ 1,487,491	$ 1,283,718
Cost of services	380,719	297,605	1,001,678	868,820
Gross profit	191,404	144,838	485,813	414,898
Selling, general and administrative expenses	128,614	100,608	353,416	296,331
Amortization of intangible assets	11,325	5,532	23,151	16,592
Operating income	51,465	38,698	109,246	101,975
Interest expense, net	(9,543)	(3,101)	(17,346)	(9,532)
Write off of Deferred Debt Issuance Cost	0	0	(3,751)	0
Income before income taxes	41,922	35,597	88,149	92,443
Provision for income taxes	17,031	14,874	35,900	38,474
Income from continuing operations	24,891	20,723	52,249	53,969
Gain on sale of discontinued operations, net of income taxes	0	0	25,703	0
Income from discontinued operations, net of tax	34	1,282	360	2,742
Net income	$ 24,925	$ 22,005	$ 78,312	$ 56,711
Basic earnings per common share:
Income from continuing operations	$ 0.47	$ 0.39	$ 1	$ 1
Discontinued operations	0	0.02	0.50	0.05
Net income	0.47	0.41	1.50	1.05
Diluted earnings per common share:
Income from continuing operations	0.47	0.38	0.99	0.98
Discontinued operations	0	0.03	0.49	0.05
Net income	$ 0.47	$ 0.41	$ 1.48	$ 1.03
Number of shares and share equivalents used to calculate earnings per share:
Basic	52,654	53,374	52,053	53,955
Diluted	53,304	54,129	52,759	54,804
Reconciliation of net income to comprehensive income:
Net income	$ 24,925	$ 22,005	$ 78,312	$ 56,711
Changes in fair value of derivatives, net of tax	0	19	122	70
Foreign currency translation adjustment, net of tax	290	(2,884)	(2,606)	(3,088)
Comprehensive income	$ 25,215	$ 19,140	$ 75,828	$ 53,693

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015		Sep. 30, 2014
Cash Flows from Operating Activities:
Net income	$ 78,312		$ 56,711
Adjustments to reconcile net income to net cash provided by operating activities:
Gain on sale of discontinued operations, net of income taxes	(25,703)		0
Depreciation and amortization	35,495		28,089
Stock-based compensation	15,244		11,891
Provision for Doubtful Accounts	7,491		4,873
Write off of Deferred Debt Issuance Cost	3,751		0
Gross excess tax benefits from stock-based compensation	(3,330)		(3,899)
Fair value adjustment for contingent consideration	1,408		0
Workers’ compensation and medical malpractice provision	1,623		3,242
Other	2,717		1,093
Changes in operating assets and liabilities:
Accounts receivable	(54,713)		(40,333)
Prepaid expenses and income taxes	6,583		1,982
Accounts payable	(1,056)		(1,826)
Accrued payroll and contract professional pay	25,451		14,812
Income taxes payable	(4,084)		(1,907)
Workers’ compensation and medical malpractice loss reserves	(701)		(1,384)
Other	(1,191)		(5,386)
Net cash provided by operating activities	87,297		67,958
Cash Flows from Investing Activities:
Cash paid for property and equipment	(18,177)		(14,260)
Cash received from sale of discontinued operations, net	115,440		0
Payments to Acquire Businesses, Net of Cash Acquired	(552,794)		48
Other	16		477
Net cash used in investing activities	(455,515)		(13,735)
Cash Flows from Financing Activities:
Principal payments of long-term debt	(486,125)		(139,125)
Proceeds from long-term debt	875,000		143,000
Proceeds from option exercises and employee stock purchase plan	6,398		6,143
Payment of employment taxes related to release of restricted stock awards	(6,600)		(5,521)
Gross excess tax benefits from stock-based compensation	3,330		3,899
Repurchase of common stock	(1,646)		(68,235)
Debt issuance or amendment costs	(23,890)		(447)
Payments of accrued earn-outs	0		(691)
Net cash provided by (used in) financing activities	366,467		(60,977)
Effect of exchange rate changes on cash and cash equivalents	(1,047)		(715)
Net Increase (Decrease) in Cash and Cash Equivalents	(2,798)		(7,469)
Cash and Cash Equivalents at Beginning of Year	31,714	[1]	37,350
Cash and Cash Equivalents at End of Period	28,916		29,881
Supplemental Disclosure of Cash Flow Information:
Income taxes	30,595		42,670
Interest	14,741		8,690
Supplemental Disclosure of Non-Cash Transactions:
Acquisition of property and equipment through accounts payable	$ 1,245		$ 1,301
[1]	Cash and cash equivalents at December 31, 2014 include $2.9 million from the Physician Segment (see "Note 4. Discontinued Operations").

Financial Statement Presentatio

Financial Statement Presentation	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Financial Statement Presentation	1. Financial Statement Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") and the rules of the Securities and Exchange Commission. Certain information and note disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those rules and regulations. The December 31, 2014 condensed consolidated balance sheet was derived from audited financial statements. The financial statements include adjustments consisting of normal recurring items, which, in the opinion of management, are necessary for a fair presentation of the financial position of On Assignment, Inc. and its subsidiaries (the "Company") and its results of operations for the interim dates and periods set forth herein. The results for any of the interim periods are not necessarily indicative of the results to be expected for the full year or any other period. This Quarterly Report on Form 10-Q should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 (" 2014 10-K"). Certain reclassifications have been made to the accompanying condensed consolidated statement of cash flows for the nine months ended September 30, 2014 , to conform with the current period presentation.

Accounting Standards Updates (N

Accounting Standards Updates (Notes)	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounting Standards Update	2. Accounting Standards Update In April 2015, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update No. 2015-03, Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs (“ASU 2015-03”). ASU No. 2015-03 requires that deferred loan costs be presented in the balance sheet as a direct deduction from the carrying amount of debt, consistent with debt discounts. The Company adopted this new guidance as of June 30, 2015 and it is applied retrospectively for all periods presented. Our term loan balances are presented in the balance sheet net of unamortized deferred loan costs, and face value of the debt is disclosed in the notes to the financial statements (see "Note 6. Long-Term Debt "). In September 2015, the FASB issued Accounting Standards Update No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments (“ASU 2015-16”). ASU No. 2015-16 requires that an aquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The acquirer must 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 has been completed at the acquisition date. This new guidance is effective for fiscal years beginning after December 15, 2015. The Company will adopt this new guidance on January 1, 2016 and does not expect it will have a material effect on its consolidated financial statements.

Aquisitions

Aquisitions	9 Months Ended
	Sep. 30, 2015
Acquisitions [Abstract]
Business Combination Disclosure [Text Block]	3. Acquisitions On June 5, 2015 , the Company acquired all of the outstanding shares of the holding company for Creative Circle, LLC (“Creative Circle”). Creative Circle, which is headquartered in Los Angeles, California , was purchased to expand the Company’s technical and creative staffing services . The purchase price consisted of $540.0 million cash, $30.0 million of common stock, and additional consideration of up to $30.0 million , if certain performance targets for 2015 are achieved. The consideration at closing was comprised of $540.9 million in cash (inclusive of $0.9 million net working capital adjustment), fair value of stock of $30.2 million ( 794,700 shares of the Company’s common stock), and estimated future contingent consideration of $13.8 million . Goodwill related to this acquisition totaled $358.5 million , of which $348.9 million is expected to be deductible for income tax purposes. Acquisition expenses of approximately $5.7 million were expensed in 2015 and are included in selling, general and administrative expenses ("SG&A"). The results of operations for this acquisition have been combined with those of the Company from the acquisition date and are included in the Apex Segment (see "Note 13. Segment Reporting "). The condensed consolidated statement of operations and comprehensive income for the nine months ended September 30, 2015 includes Creative Circle revenues of $92.6 million and operating income of $12.8 million . On April 14, 2015 , the Company acquired all of the outstanding shares of LabResource B.V. ("LabResource") headquartered in Amsterdam, Netherlands for $12.7 million . LabResource was purchased to expand the Company's life sciences staffing business in Europe . Goodwill associated with this acquisition is not deductible for tax purposes. Acquisition expenses of approximately $0.4 million were expensed in 2015 and are included in SG&A. The results of operations for this acquisition have been combined with those of the Company from the acquisition date and are included in the Oxford Segment (see "Note 13. Segment Reporting "). The condensed consolidated statement of operations and comprehensive income for the nine months ended September 30, 2015 includes LabResource revenues of $4.9 million and operating income of $0.7 million . Assets and liabilities of the acquired companies were recorded at their estimated fair values at the dates of acquisition. The excess purchase price over the fair value of net tangible assets and identifiable intangible assets acquired has been allocated to goodwill. The fair value assigned to identifiable intangible assets was determined primarily by using a discounted cash flow method. The fair value of contingent consideration is based on the present value of the expected future payments to be made to the sellers of the acquired business in accordance with the purchase agreement. There are numerous inputs for these valuations, which the Company will finalize during the measurement period. The allocation of the purchase price of Creative Circle was updated during the quarter to reduce goodwill by $3.3 million as a result of a change in the preliminary fair value estimate of contingent consideration. The Company's allocation of the purchase price of Creative Circle and LabResource remains incomplete and any measurement period adjustments that result from the finalization of the purchase price allocation will be recorded retrospectively to the acquisition date. Changes are possible and could change the allocation of the purchase price. The following table summarizes (in thousands) the purchase price allocations for the acquisitions of Creative Circle and LabResource: Creative Circle LabResource Cash $ 4,840 $ 187 Accounts receivable 34,386 1,643 Prepaid expenses and other current assets 3,865 — Property and equipment 5,077 12 Goodwill 358,460 6,104 Identifiable intangible assets 194,500 7,528 Other 651 — Total assets acquired $ 601,779 $ 15,474 Current liabilities $ 12,072 $ 1,482 Other — 1,882 Total liabilities assumed 12,072 3,364 Total purchase price $ 589,707 $ 12,110 The following table summarizes (in thousands) the allocation of the purchase price among the identifiable intangible assets for the acquisitions of Creative Circle and LabResource : Identifiable Intangible Asset Value Useful life Creative Circle LabResource Contractor relationships 4 years $ 29,500 $ 947 Customer relationships 10 years 90,700 5,421 Non-compete agreements 2 - 6 years 7,300 20 Favorable contracts 5 years 900 — Trademarks indefinite 66,100 1,140 Total identifiable intangible assets acquired $ 194,500 $ 7,528 The following summary (in thousands, except for per share data) presents pro forma unaudited consolidated results of operations for the nine months ended September 30, 2015 and 2014 as if the acquisitions of Creative Circle and LabResource had occurred on January 1, 2014. The pro forma financial information gives effect to certain adjustments, including: amortization of intangible assets, interest expense on acquisition-related debt, provision for income taxes, and increased number of common shares as a result of the acquisition. Acquisition-related costs of $6.1 million and write-off of loan costs of $3.8 million are assumed to have occurred at the beginning of the year prior to acquisition. The pro forma financial information is not necessarily indicative of the operating results that would have occurred if the acquisitions had been consummated as of the date indicated, nor are they necessarily indicative of future operating results. Nine months ended September 30, 2015 2014 Revenues $ 1,601,437 $ 1,456,081 Income from continuing operations $ 59,986 $ 45,238 Net income $ 86,049 $ 47,980 Basic earnings per share: Income from continuing operations $ 1.14 $ 0.83 Net income $ 1.64 $ 0.88 Diluted earnings per share: Income from continuing operations $ 1.13 $ 0.81 Net income $ 1.62 $ 0.86 Weighted average number of shares outstanding 52,508 54,750 Weighted average number of shares and dilutive shares outstanding 53,213 55,629

Discontinued Operations

Discontinued Operations	9 Months Ended
	Sep. 30, 2015
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	4. Discontinued Operations On February 1, 2015, the Company completed the sale of its Physician Segment for $123.0 million , of which $6.0 million was placed in escrow for a period of 12 months. The gain on the sale was $25.7 million (net of income taxes of $14.4 million ), which was included in discontinued operations. The $6.0 million placed in escrow is included in current assets in the condensed consolidated balance sheet at September 30, 2015 . The operating results of this segment are presented as discontinued operations in the condensed consolidated statements of operations and comprehensive income for all periods presented. The condensed consolidated balance sheet at December 31, 2014 separately states the assets and liabilities of the Physician Segment as discontinued operations. The following table is a reconciliation of the major classes of assets and liabilities of the Physician Segment that are presented separately in the condensed consolidated balance sheet at December 31, 2014, to the previously reported balances: December 31, 2014 As Previously Reported Physician Segment As Adjusted Cash and cash equivalents $ 31,714 $ (2,854 ) $ 28,860 Accounts receivable, net 298,761 (21,615 ) 277,146 Prepaid expenses and income taxes 14,513 (1,205 ) 13,308 Deferred income tax assets 19,067 (3,321 ) 15,746 Workers' compensation and medical malpractice receivable 18,728 (5,358 ) 13,370 Other current assets (1) 2,310 — 2,310 Current assets of discontinued operations — 34,353 34,353 Total current assets 385,093 — 385,093 Property and equipment, net 46,819 (2,508 ) 44,311 Goodwill 570,697 (58,637 ) 512,060 Identifiable intangible assets, net 262,569 (11,960 ) 250,609 Other non-current assets (1) 5,728 (568 ) 5,160 Non-current assets of discontinued operations — 73,673 73,673 Total assets $ 1,270,906 $ — $ 1,270,906 Current portion of long-term debt (1) $ 17,439 $ — $ 17,439 Accounts payable 8,876 (951 ) 7,925 Accrued payroll and contract professional pay 87,189 (4,626 ) 82,563 Workers’ compensation and medical malpractice loss reserves 29,135 (13,571 ) 15,564 Income taxes payable 340 — 340 Other current liabilities 21,776 (1,047 ) 20,729 Current liabilities of discontinued operations — 20,195 20,195 Total current liabilities 164,755 — 164,755 Long-term debt (1) 394,418 — 394,418 Deferred income tax liabilities 67,909 (4,088 ) 63,821 Other long-term liabilities 9,416 (1,479 ) 7,937 Long-term liabilities of discontinued operations — 5,567 5,567 Total liabilities $ 636,498 $ — $ 636,498 ____ (1) The December 31, 2014 balances have been adjusted to reflect unamortized deferred loan costs attributable to term loans as a reduction of the related debt balances whereas they were previously included in other current assets and other non-current assets. This change in presentation was the result of the early adoption of ASU 2015-03. The December 31, 2014 balances for long-term debt and the current portion of long-term debt are now reflected net of $2.5 million and $0.8 million of unamortized deferred loan costs, respectively. Cash flows from discontinued operations are included in the condensed consolidated statements of cash flows for the nine months ended September 30, 2015 and 2014 . The cash flows that are attributable to the Physician Segment are as follows: Nine Months Ended September 30, 2015 2014 Net cash provided by (used in) operating activities $ (1,778 ) $ 1,332 Net cash provided by (used in) investing activities: Cash received from sale of discontinued operations, net $ 115,440 $ — Other (14 ) (233 ) Total cash provided by (used in) investing activities $ 115,426 $ (233 ) The following is a summary of the operating results of all of the Company's discontinued operations (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2015 2014 2015 2014 Revenues $ — $ 35,381 $ 12,068 $ 101,998 Cost of services — 24,594 8,653 71,015 Gross profit — 10,787 3,415 30,983 Selling, general and administrative expenses (36 ) 8,113 2,757 24,471 Amortization of intangible assets — 486 155 1,754 Income before income taxes 36 2,188 503 4,758 Provision for income taxes 2 906 143 2,016 Net income $ 34 $ 1,282 $ 360 $ 2,742

Goodwill and Identifiable Asset

Goodwill and Identifiable Assets	9 Months Ended
	Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Identifiable Intangible Assets	5. Goodwill and Identifiable Intangible Assets The changes in the carrying amount of goodwill for the year ended December 31, 2014 and the nine months ended September 30, 2015 are as follows (in thousands): Apex Segment Oxford Segment Total Balance as of December 31, 2013 $ 289,712 $ 224,714 $ 514,426 Translation adjustment (1,761 ) (605 ) (2,366 ) Balance as of December 31, 2014 287,951 224,109 512,060 Creative Circle Acquisition (See Note 3) 358,460 — 358,460 LabResource Acquisition (See Note 3) — 6,104 6,104 Translation adjustment (963 ) 53 (910 ) Balance as of September 30, 2015 $ 645,448 $ 230,266 $ 875,714 Acquired intangible assets consisted of the following (in thousands): As of September 30, 2015 As of December 31, 2014 Estimated Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Intangible assets subject to amortization: Customer relationships 2 - 10 years $ 197,230 $ 67,934 $ 129,296 $ 101,141 $ 53,434 $ 47,707 Contractor relationships 2 - 5 years 69,806 37,314 32,492 39,332 32,021 7,311 Non-compete agreements 2 - 7 years 10,916 2,755 8,161 3,654 1,922 1,732 In-use software 6 years 18,900 5,729 13,171 18,900 3,366 15,534 Favorable contracts (1) 5 years 900 97 803 — — — 297,752 113,829 183,923 163,027 90,743 72,284 Intangible assets not subject to amortization: Trademarks 245,698 — 245,698 178,325 — 178,325 Total $ 543,450 $ 113,829 $ 429,621 $ 341,352 $ 90,743 $ 250,609 (1) The favorable contracts intangible asset pertains to operating leases which are amortized as rent expense and incl uded in SG&A expenses in the accompanying condensed consolidated statements of operations and comprehensive income. Expense associated with this favorable contracts intangible asset is not significant. Amortization expense for intangible assets with finite lives was $11.3 million and $5.5 million for the three months ended September 30, 2015 and 2014 , respectively, and was $23.2 million and $16.6 million for the nine months ended September 30, 2015 and 2014 , respectively. Estimated amortization expense for the remainder of this year, each of the next four years, and thereafter is as follows (in thousands): 2015 $ 11,373 2016 39,700 2017 33,068 2018 28,940 2019 22,039 Thereafter 48,803 $ 183,923 Goodwill and other intangible assets having an indefinite useful life are not amortized for financial statement purposes. These assets are reviewed for impairment on an annual basis as of October 31 and whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. There w ere no triggerin g events that required an interim impairment analysis during the current period.

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2015
Debt Disclosure [Abstract]
Long-Term Debt	6. Long-Term Debt Long-term debt consisted of the following (in thousands): September 30, December 31, 2014 Senior Secured Debt: $150 million revolving credit facility, due June 2020 $ 50,000 $ — $825 million Term B loan facility, due June 2022 754,000 — $125 million revolving credit facility, repaid June 2015 — 76,000 Term A loan facility, repaid June 2015 — 158,813 Term B loan facility, repaid June 2015 — 180,312 Total face value 804,000 415,125 Unamortized deferred loan costs (19,203 ) (3,268 ) $ 784,797 $ 411,857 On June 5, 2015, the Company entered into a new $975.0 million credit facility. The funds were used to repay the old credit facility and to fund the cash portion of the purchase of Creative Circle (see "Note 3. Acquisitions "). The new facility consists of (i) an $825.0 million seven-year term B loan facility and (ii) a $150.0 million five-year revolving loan facility. Under terms of the new facility, the Company has the ability to increase the principal amount of the loan facilities. Borrowings under the term B loan bear interest at LIBOR (floor of 75 basis points), plus 3.0 percent and borrowings under the revolving credit facility bear interest at LIBOR (or the bank’s base rate) plus 0.75 to 2.5 percent depending on leverage levels. A commitment fee of 0.25 to 0.40 percent is payable on the undrawn portion of the revolving credit facility. At September 30, 2015, the weighted average interest rate was 3.68 percent . Under terms of the credit facility, the Company is required to make minimum quarterly payments of $2.1 million . Through September 30, 2015, the Company repaid $71.0 million , and as a result, the next required payments will be on the maturity dates. The Company is also required to make mandatory prepayments, subject to specified exceptions, from excess cash flow and with the proceeds of asset sales, debt issuances and specified other events. The Company's obligations under the credit facility are guaranteed by substantially all of its direct and indirect domestic subsidiaries and are secured by a lien on substantially all of the Company's tangible and intangible property and by a pledge of all of the equity interests in its direct and indirect domestic subsidiaries. The credit facility includes various restrictive covenants including the maximum ratio of consolidated funded debt to consolidated EBITDA ( 4.50 :1.00 as of September 30, 2015 decreasing to 3.25 :1.00 on March 31, 2018). The credit facility also contains certain customary limitations including, among other terms and conditions, the Company's ability to incur additional indebtedness, engage in mergers and acquisitions, and declare dividends. At September 30, 2015 the Company had a ratio of consolidated funded debt to consolidated EBITDA of 3.21 :1.00. At September 30, 2015 the Company was in compliance with all of its debt covenants and had $96.3 million of borrowing available under the revolving credit facility.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	7. Commitments and Contingencies The Company carries retention policies for its workers’ compensation liability. The workers' compensation loss reserves are determined based on claims filed and claims incurred but not reported. The Company accounts for claims incurred but not yet reported based on estimates derived from historical claims experience and current trends of industry data. Changes in estimates and actual payments for claims are recognized in the period that the estimates change or the payments are made. The workers' compensation loss reserves were approximately $1.9 million and $2.2 million , net of anticipated insurance and indemnification recoveries of $13.7 million and $13.4 million , at September 30, 2015 and December 31, 2014 , respectively. Additionally, the Company has undrawn stand-by letters of credit outstanding to support obligations for workers’ compensation claims with various insurance carriers. The stand-by letters of credit were $3.7 million and $3.2 million at September 30, 2015 and December 31, 2014 , respectively. Under terms of the acquisition agreements, the sellers of CyberCoders and Creative Circle are entitled to additional consideration if certain performance targets are met. As of September 30, 2015 , the Company has potential future contingent consideratio n of $41.0 million through the end of 2015. Refer to "Note 8. Fair Value Measurements " for further information related to this contingent liability. The Company has entered into various non-cancelable operating leases, primarily related to its facilities and certain office equipment used in the ordinary course of business. The Company lea ses two properties own ed by related parties. At September 30, 2015 and December 31, 2014 , the Company had an income tax reserve in other long-term liabilities related to uncertain tax positions of $0.9 million . The Company is involved in various legal proceedings, claims and litigation arising in the ordinary course of business. Based on the facts currently available, the Company does not believe that the disposition of matters that are pending or asserted will have a material effect on its consolidated financial statements.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	8. Fair Value Measurements The recorded values of cash and cash equivalents, accounts receivable, accounts payable and accrued expenses approximate their fair value based on their short-term nature. Long-term debt recorded in the Company’s condensed consolidated balance sheet at September 30, 2015 was $784.8 million (net of $19.2 million of unamortized deferred loan costs, see "Note 6. Long-Term Debt "). The f air value of the long-term debt at that same date was $809.5 million as determined using the quoted price technique, based on Level 2 inputs including the yields of comparable companies with similar credit characteristics . Related to acquisitions, at September 30, 2015 , the Company had obligations to pay up to $41.0 million of contingent consideration in cash if certain future financial results are met. The fair value of this contingent consideration was determined using an expected present value technique. Expected cash flows were determined using the probability-weighted average of possible outcomes that would occur should certain financial metrics be reached. There is no market data available to use in valuing the contingent consideration, therefore, the Company developed its own assumptions related to the future financial performance of the businesses to evaluate the fair value of these liabilities. As such, the contingent consideration is classified within Level 3. The liability for contingent consideration is established at the time of the acquisition and finalized by the end of the measurement period. Its fair value i s remeasured on a recurring basis. Changes due to accretion of discount are recorded in interest expense, while changes related to new developments in expected performance are recorded in SG&A. At September 30, 2015 , contingent consideration was determined to be $18.2 million and is included in other current liabilities. At December 31, 2014, contingent consideration was $3.0 million and was included in other long-term liabilities. The reconciliation of contingent consideration liability measured and carried at fair value on a recurring basis with the use of significant unobservable inputs (Level 3) is as follows (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2015 2014 2015 2014 Balance at beginning of period $ (17,326 ) $ (3,000 ) $ (3,000 ) $ (3,667 ) Additions for acquisitions — — (13,814 ) — Payments on contingent consideration — — — 691 Fair value adjustment (896 ) — (1,408 ) — Foreign currency translation adjustment — — — (24 ) Balance at end of period $ (18,222 ) $ (3,000 ) $ (18,222 ) $ (3,000 ) Certain assets and liabilities, such as goodwill, are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances (e.g., when there is evidence of impairment). For the nine months ended September 30, 2015 and 2014, no fair value adjustments were required for non-financial assets or liabilities.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Treasury Stock [Text Block]	9. Stockholders' Equity During the nine months ended September 30, 2015, the Company repurchased 43,000 shares of its common stock at a cost of $1.6 million . All shares repurchased under this program were retired, which resulted in a reduction of $0.4 million in paid-in capital and a reduction of $1.2 million in retained earnings. The Company also issued 794,700 shares of its common stock valued at $30.2 million in connection with the purchase of Creative Circle during the nine months ended September 30, 2015 , see "Note 3. Acquisitions ." The accumulated other comprehensive loss balance at September 30, 2015 and December 31, 2014, and the activity during the nine months ended September 30, 2015 , consists primarily of foreign currency translation adjustments.

Stock-based compensation

Stock-based compensation	9 Months Ended
	Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Incentive Award Plan and Employee Stock Purchase Plan	10. Stock-based Compensation The Company issued 125,101 and 79,300 shares of common stock on March 31, 2015 and September 30, 2015, respectively, under its Employee Stock Purchase Plan, as amended ("ESPP"). Stock-based compensation expense, including the ESPP, was $6.1 million and $4.6 million for the three months ended September 30, 2015 and 2014 , respectively, which was included in SG&A expense, except for $0.1 million in 2014 that was included in discontinued operations. Stock-based compensation expense was $15.2 million and $11.9 million for the nine months ended September 30, 2015 and 2014 , respectively, which was included in SG&A expense, except for $0.4 million in 2014 that was included in discontinued operations

Earnings per share

Earnings per share	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Earnings per share	11. Earnings Per Share The following is a reconciliation of the shares used to compute basic and diluted earnings per share (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2015 2014 2015 2014 Weighted average number of common shares outstanding used to compute basic earnings per share 52,654 53,374 52,053 53,955 Dilutive effect of stock-based awards 650 755 706 849 Number of shares used to compute diluted earnings per share 53,304 54,129 52,759 54,804 The amount of anti-dilutive share equivalents outstanding during the three and nine months ended September 30, 2015 and 2014 was insignificant.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	12. Income Taxes For interim reporting periods, the Company prepares an estimate of the full-year income and the related income tax expense for each jurisdiction in which the Company operates. Changes in the geographical mix, permanent differences or estimated level of annual pre-tax income can impact the Company’s actual effective rate.

Segment Reporting

Segment Reporting	9 Months Ended
	Sep. 30, 2015
Segment Reporting [Abstract]
Segment Reporting	13. Segment Reporting The Company has two reportable segments: Apex and Oxford. The Apex Segment has historically provided information technology and scientific staffing professionals for contract, contract-to-hire and permanent placement positions to Fortune 1000 and mid-market clients across the United States. With the acquisition of Creative Circle on June 5, 2015, the Apex Segment also provides professionals with digital/creative skillsets. The Apex Segment also offers consulting services for select project-based needs. This segment provides staffing and services support to companies from all major industries, including financial services, business services, consumer and industrials, technology, government services, communications, advertising, and scientific. The Oxford Segment provides high-end contract placement services of information technology and engineering professionals with expertise in specialized information technology, software and hardware engineering, and mechanical, electrical, validation, telecommunications engineering, laboratory and life sciences fields. The Oxford Segment also provides direct hire placement services of professionals across many different fields and functions; the majority of its placements are information technology, finance, accounting, sales, engineering, laboratory and scientific professionals. During the quarter ended June 30, 2015, due to management changes, the Company realigned its former Life Sciences Europe Segment and it is now included in the Oxford Segment. All prior periods have been retrospectively restated to conform to the current presentation. The Company’s management evaluates the performance of each segment primarily based on revenues, gross profit, and operating income. The information in the following tables is derived directly from the segments’ internal financial reporting used for corporate management purposes. The Company's management does not evaluate, manage or measure performance of segments using asset information, and such information is not readily available. Accordingly, assets by reportable segment are not disclosed. The following tables present revenues, gross profit, operating income and amortization by reportable segment (in thousands): Three Months Ended Three Months Ended September 30, 2015 September 30, 2014 Apex Oxford Corporate Total Apex Oxford Corporate Total Revenues $ 421,067 $ 151,056 $ — $ 572,123 $ 306,027 $ 136,416 $ — $ 442,443 Gross profit 128,731 62,673 — 191,404 87,323 57,515 — 144,838 Operating income 48,119 19,283 (15,937 ) 51,465 33,735 19,065 (14,102 ) 38,698 Amortization 9,732 1,593 — 11,325 4,089 1,443 — 5,532 Nine Months Ended Nine Months Ended September 30, 2015 September 30, 2014 Apex Oxford Corporate Total Apex Oxford Corporate Total Revenues $ 1,054,064 $ 433,427 $ — $ 1,487,491 $ 882,328 $ 401,390 $ — $ 1,283,718 Gross profit 306,026 179,787 — 485,813 247,506 167,392 — 414,898 Operating income 105,258 53,858 (49,870 ) 109,246 88,227 53,699 (39,951 ) 101,975 Amortization 18,638 4,513 — 23,151 12,267 4,317 8 16,592 As described in " Note 4. Discontinued Operations ," the Company sold its Physician Segment on February 1, 2015 and the results of that business are reported as discontinued operations in the condensed consolidated statements of operations for all periods presented. Accordingly, the Physician Segment is not included in the tables above. Approximately $0.3 million and $1.0 million of the previously reported Corporate costs during the three and nine months ended September 30, 2014, respectively, were specifically attributed to the Physician Segment and those costs are included in discontinued operations in the condensed consolidated statements of operations, as these costs are not reflective of ongoing operations. The following table presents revenues by type (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2015 % 2014 % 2015 % 2014 % Revenues: Assignment $ 539,383 94.3 % $ 419,990 94.9 % $ 1,402,116 94.3 % $ 1,220,800 95.1 % Direct hire and conversion fees 32,740 5.7 % 22,453 5.1 % 85,375 5.7 % 62,918 4.9 % $ 572,123 100.0 % $ 442,443 100.0 % $ 1,487,491 100.0 % $ 1,283,718 100.0 % The Company operates internationally, with operations mainly in the United States, Europe, and Canada. The following table presents revenues by geographic location (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2015 % 2014 % 2015 % 2014 % Revenues: Domestic $ 546,747 95.6 % $ 421,640 95.3 % $ 1,420,492 95.5 % $ 1,223,217 95.3 % Foreign 25,376 4.4 % 20,803 4.7 % 66,999 4.5 % 60,501 4.7 % $ 572,123 100.0 % $ 442,443 100.0 % $ 1,487,491 100.0 % $ 1,283,718 100.0 %

Acquisitions Aquisitions (Polic

Acquisitions Aquisitions (Policies)	9 Months Ended
	Sep. 30, 2015
Acquisitions [Abstract]
Acquisition [Policy Text Block]	Assets and liabilities of the acquired companies were recorded at their estimated fair values at the dates of acquisition. The excess purchase price over the fair value of net tangible assets and identifiable intangible assets acquired has been allocated to goodwill. The fair value assigned to identifiable intangible assets was determined primarily by using a discounted cash flow method.

Fair Value Measurements (Polici

Fair Value Measurements (Policies)	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments, Policy [Policy Text Block]	The recorded values of cash and cash equivalents, accounts receivable, accounts payable and accrued expenses approximate their fair value based on their short-term nature. Long-term debt recorded in the Company’s condensed consolidated balance sheet at September 30, 2015 was $784.8 million (net of $19.2 million of unamortized deferred loan costs, see "Note 6. Long-Term Debt "). The f air value of the long-term debt at that same date was $809.5 million as determined using the quoted price technique, based on Level 2 inputs including the yields of comparable companies with similar credit characteristics .

Acquisitions Aquisitions (Table

Acquisitions Aquisitions (Tables)	9 Months Ended
	Sep. 30, 2015
Acquisitions [Abstract]
Business Acquisition, Pro Forma Information [Table Text Block]	The pro forma financial information is not necessarily indicative of the operating results that would have occurred if the acquisitions had been consummated as of the date indicated, nor are they necessarily indicative of future operating results. Nine months ended September 30, 2015 2014 Revenues $ 1,601,437 $ 1,456,081 Income from continuing operations $ 59,986 $ 45,238 Net income $ 86,049 $ 47,980 Basic earnings per share: Income from continuing operations $ 1.14 $ 0.83 Net income $ 1.64 $ 0.88 Diluted earnings per share: Income from continuing operations $ 1.13 $ 0.81 Net income $ 1.62 $ 0.86 Weighted average number of shares outstanding 52,508 54,750 Weighted average number of shares and dilutive shares outstanding 53,213 55,629
ScheduleOfPurchasePriceAllocationTableTextBlock [Table Text Block]	The following table summarizes (in thousands) the purchase price allocations for the acquisitions of Creative Circle and LabResource: Creative Circle LabResource Cash $ 4,840 $ 187 Accounts receivable 34,386 1,643 Prepaid expenses and other current assets 3,865 — Property and equipment 5,077 12 Goodwill 358,460 6,104 Identifiable intangible assets 194,500 7,528 Other 651 — Total assets acquired $ 601,779 $ 15,474 Current liabilities $ 12,072 $ 1,482 Other — 1,882 Total liabilities assumed 12,072 3,364 Total purchase price $ 589,707 $ 12,110
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	The following table summarizes (in thousands) the allocation of the purchase price among the identifiable intangible assets for the acquisitions of Creative Circle and LabResource : Identifiable Intangible Asset Value Useful life Creative Circle LabResource Contractor relationships 4 years $ 29,500 $ 947 Customer relationships 10 years 90,700 5,421 Non-compete agreements 2 - 6 years 7,300 20 Favorable contracts 5 years 900 — Trademarks indefinite 66,100 1,140 Total identifiable intangible assets acquired $ 194,500 $ 7,528

Discontinued Operations (Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2015
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]	The following table is a reconciliation of the major classes of assets and liabilities of the Physician Segment that are presented separately in the condensed consolidated balance sheet at December 31, 2014, to the previously reported balances: December 31, 2014 As Previously Reported Physician Segment As Adjusted Cash and cash equivalents $ 31,714 $ (2,854 ) $ 28,860 Accounts receivable, net 298,761 (21,615 ) 277,146 Prepaid expenses and income taxes 14,513 (1,205 ) 13,308 Deferred income tax assets 19,067 (3,321 ) 15,746 Workers' compensation and medical malpractice receivable 18,728 (5,358 ) 13,370 Other current assets (1) 2,310 — 2,310 Current assets of discontinued operations — 34,353 34,353 Total current assets 385,093 — 385,093 Property and equipment, net 46,819 (2,508 ) 44,311 Goodwill 570,697 (58,637 ) 512,060 Identifiable intangible assets, net 262,569 (11,960 ) 250,609 Other non-current assets (1) 5,728 (568 ) 5,160 Non-current assets of discontinued operations — 73,673 73,673 Total assets $ 1,270,906 $ — $ 1,270,906 Current portion of long-term debt (1) $ 17,439 $ — $ 17,439 Accounts payable 8,876 (951 ) 7,925 Accrued payroll and contract professional pay 87,189 (4,626 ) 82,563 Workers’ compensation and medical malpractice loss reserves 29,135 (13,571 ) 15,564 Income taxes payable 340 — 340 Other current liabilities 21,776 (1,047 ) 20,729 Current liabilities of discontinued operations — 20,195 20,195 Total current liabilities 164,755 — 164,755 Long-term debt (1) 394,418 — 394,418 Deferred income tax liabilities 67,909 (4,088 ) 63,821 Other long-term liabilities 9,416 (1,479 ) 7,937 Long-term liabilities of discontinued operations — 5,567 5,567 Total liabilities $ 636,498 $ — $ 636,498 The following is a summary of the operating results of all of the Company's discontinued operations (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2015 2014 2015 2014 Revenues $ — $ 35,381 $ 12,068 $ 101,998 Cost of services — 24,594 8,653 71,015 Gross profit — 10,787 3,415 30,983 Selling, general and administrative expenses (36 ) 8,113 2,757 24,471 Amortization of intangible assets — 486 155 1,754 Income before income taxes 36 2,188 503 4,758 Provision for income taxes 2 906 143 2,016 Net income $ 34 $ 1,282 $ 360 $ 2,742 The cash flows that are attributable to the Physician Segment are as follows: Nine Months Ended September 30, 2015 2014 Net cash provided by (used in) operating activities $ (1,778 ) $ 1,332 Net cash provided by (used in) investing activities: Cash received from sale of discontinued operations, net $ 115,440 $ — Other (14 ) (233 ) Total cash provided by (used in) investing activities $ 115,426 $ (233 )

Goodwill and Identifiable Ass23

Goodwill and Identifiable Assets (Tables)	9 Months Ended
	Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The changes in the carrying amount of goodwill for the year ended December 31, 2014 and the nine months ended September 30, 2015 are as follows (in thousands): Apex Segment Oxford Segment Total Balance as of December 31, 2013 $ 289,712 $ 224,714 $ 514,426 Translation adjustment (1,761 ) (605 ) (2,366 ) Balance as of December 31, 2014 287,951 224,109 512,060 Creative Circle Acquisition (See Note 3) 358,460 — 358,460 LabResource Acquisition (See Note 3) — 6,104 6,104 Translation adjustment (963 ) 53 (910 ) Balance as of September 30, 2015 $ 645,448 $ 230,266 $ 875,714
Schedule of Acquired Intangible Assets	cquired intangible assets consisted of the following (in thousands): As of September 30, 2015 As of December 31, 2014 Estimated Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Intangible assets subject to amortization: Customer relationships 2 - 10 years $ 197,230 $ 67,934 $ 129,296 $ 101,141 $ 53,434 $ 47,707 Contractor relationships 2 - 5 years 69,806 37,314 32,492 39,332 32,021 7,311 Non-compete agreements 2 - 7 years 10,916 2,755 8,161 3,654 1,922 1,732 In-use software 6 years 18,900 5,729 13,171 18,900 3,366 15,534 Favorable contracts (1) 5 years 900 97 803 — — — 297,752 113,829 183,923 163,027 90,743 72,284 Intangible assets not subject to amortization: Trademarks 245,698 — 245,698 178,325 — 178,325 Total $ 543,450 $ 113,829 $ 429,621 $ 341,352 $ 90,743 $ 250,609
Schedule of Estimated Future Amortization Expense	Estimated amortization expense for the remainder of this year, each of the next four years, and thereafter is as follows (in thousands): 2015 $ 11,373 2016 39,700 2017 33,068 2018 28,940 2019 22,039 Thereafter 48,803 $ 183,923

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2015
Debt Disclosure [Abstract]
Schedule of Long-term Debt	ong-term debt consisted of the following (in thousands): September 30, December 31, 2014 Senior Secured Debt: $150 million revolving credit facility, due June 2020 $ 50,000 $ — $825 million Term B loan facility, due June 2022 754,000 — $125 million revolving credit facility, repaid June 2015 — 76,000 Term A loan facility, repaid June 2015 — 158,813 Term B loan facility, repaid June 2015 — 180,312 Total face value 804,000 415,125 Unamortized deferred loan costs (19,203 ) (3,268 ) $ 784,797 $ 411,857

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis	At September 30, 2015 , contingent consideration was determined to be $18.2 million and is included in other current liabilities. At December 31, 2014, contingent consideration was $3.0 million and was included in other long-term liabilities.
Schedule of Reconciliations of Liabilities Measured and Carried at Fair Value on Recurring Basis, with Significant Unobservable Inputs	The reconciliation of contingent consideration liability measured and carried at fair value on a recurring basis with the use of significant unobservable inputs (Level 3) is as follows (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2015 2014 2015 2014 Balance at beginning of period $ (17,326 ) $ (3,000 ) $ (3,000 ) $ (3,667 ) Additions for acquisitions — — (13,814 ) — Payments on contingent consideration — — — 691 Fair value adjustment (896 ) — (1,408 ) — Foreign currency translation adjustment — — — (24 ) Balance at end of period $ (18,222 ) $ (3,000 ) $ (18,222 ) $ (3,000 )

Earnings per share (Tables)

Earnings per share (Tables)	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Reconciliation of Shares Used to Compute Basic and Diluted Earnings per Share	The following is a reconciliation of the shares used to compute basic and diluted earnings per share (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2015 2014 2015 2014 Weighted average number of common shares outstanding used to compute basic earnings per share 52,654 53,374 52,053 53,955 Dilutive effect of stock-based awards 650 755 706 849 Number of shares used to compute diluted earnings per share 53,304 54,129 52,759 54,804

Segment Reporting (Tables)

Segment Reporting (Tables)	9 Months Ended
	Sep. 30, 2015
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The following tables present revenues, gross profit, operating income and amortization by reportable segment (in thousands): Three Months Ended Three Months Ended September 30, 2015 September 30, 2014 Apex Oxford Corporate Total Apex Oxford Corporate Total Revenues $ 421,067 $ 151,056 $ — $ 572,123 $ 306,027 $ 136,416 $ — $ 442,443 Gross profit 128,731 62,673 — 191,404 87,323 57,515 — 144,838 Operating income 48,119 19,283 (15,937 ) 51,465 33,735 19,065 (14,102 ) 38,698 Amortization 9,732 1,593 — 11,325 4,089 1,443 — 5,532 Nine Months Ended Nine Months Ended September 30, 2015 September 30, 2014 Apex Oxford Corporate Total Apex Oxford Corporate Total Revenues $ 1,054,064 $ 433,427 $ — $ 1,487,491 $ 882,328 $ 401,390 $ — $ 1,283,718 Gross profit 306,026 179,787 — 485,813 247,506 167,392 — 414,898 Operating income 105,258 53,858 (49,870 ) 109,246 88,227 53,699 (39,951 ) 101,975 Amortization 18,638 4,513 — 23,151 12,267 4,317 8 16,592
Schedule of Revenue by Geographical Areas	The Company operates internationally, with operations mainly in the United States, Europe, and Canada. The following table presents revenues by geographic location (in thousands): Three Months Ended Nine Months Ended September 30, September 30, 2015 % 2014 % 2015 % 2014 % Revenues: Domestic $ 546,747 95.6 % $ 421,640 95.3 % $ 1,420,492 95.5 % $ 1,223,217 95.3 % Foreign 25,376 4.4 % 20,803 4.7 % 66,999 4.5 % 60,501 4.7 % $ 572,123 100.0 % $ 442,443 100.0 % $ 1,487,491 100.0 % $ 1,283,718 100.0 %

Acquisitions Acquisitions Costs

Acquisitions Acquisitions Costs, by Acquisition (Details) - USD ($) $ in Thousands	Jun. 05, 2015	Apr. 14, 2015	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2015	Sep. 30, 2015	Sep. 30, 2014
Business Acquisition [Line Items]
Write off of Deferred Debt Issuance Cost			$ 0	$ 0		$ 3,751	$ 0
Business Combination, Acquisition Related Costs						6,100
Potential future earn-out obligations			41,000			41,000
Stock Issued During Period, Value, Acquisitions					$ 30,200	$ 30,200
Stock Issued During Period, Shares, Acquisitions					794,700	794,700
Sales Revenue, Services, Net			572,123	442,443		$ 1,487,491	1,283,718
Operating Income (Loss)			$ 51,465	$ 38,698		109,246	$ 101,975
Creative Circle [Member]
Business Acquisition [Line Items]
BusinessCombinationRecognizedGoodwill	$ 358,460
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	194,500
Business Acquisition, Goodwill, Expected Tax Deductible Amount	$ 348,900
Business Combination, Acquisition Related Costs						5,700
Business Acquisition, Effective Date of Acquisition	Jun. 5, 2015
Potential future earn-out obligations	$ 30,000
Business Acquisition, Name of Acquired Entity	Creative Circle, LLC
Business Acquisition, Description of Acquired Entity	is headquartered in Los Angeles, California
Business Combination, Consideration Transferred	$ 540,900
Business Combination, Consideration Transferred, Other	$ 900
Business Combination, Reason for Business Combination	was purchased to expand the Company’s technical and creative staffing services
Payments to Acquire Businesses, Gross	$ 540,000
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	30,000
Sales Revenue, Services, Net					$ 92,600
Operating Income (Loss)					12,800
LabResource [Member]
Business Acquisition [Line Items]
BusinessCombinationRecognizedGoodwill		$ 6,104
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		$ 7,528
Business Combination, Acquisition Related Costs						$ 400
Business Acquisition, Effective Date of Acquisition		Apr. 14, 2015
Business Acquisition, Name of Acquired Entity		LabResource B.V.
Business Acquisition, Description of Acquired Entity		headquartered in Amsterdam, Netherlands
Business Combination, Reason for Business Combination		expand the Company's life sciences staffing business in Europe
Payments to Acquire Businesses, Gross		$ 12,700
Sales Revenue, Services, Net					4,900
Operating Income (Loss)					$ 700
Contractor Relations [Member]
Business Acquisition [Line Items]
Acquired Finite Lived Intangible Assets Average Useful Life						4 years
Contractor Relations [Member] | Creative Circle [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	29,500
Contractor Relations [Member] | LabResource [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		947
Non-compete agreements | Creative Circle [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	7,300
Non-compete agreements | LabResource [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		20
Contract-Based Intangible Assets [Member]
Business Acquisition [Line Items]
Acquired Finite Lived Intangible Assets Average Useful Life						5 years
Contract-Based Intangible Assets [Member] | Creative Circle [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	900
Contract-Based Intangible Assets [Member] | LabResource [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		0
Customer relations
Business Acquisition [Line Items]
Acquired Finite Lived Intangible Assets Average Useful Life						10 years
Customer relations | Creative Circle [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 90,700
Customer relations | LabResource [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		$ 5,421
Maximum [Member] | Non-compete agreements
Business Acquisition [Line Items]
Acquired Finite Lived Intangible Assets Average Useful Life						6 years
Minimum [Member] | Non-compete agreements
Business Acquisition [Line Items]
Acquired Finite Lived Intangible Assets Average Useful Life						2 years

Acquisitions Schedule of Purcha

Acquisitions Schedule of Purchase Price Allocation (Details) - USD ($) $ in Thousands	Jun. 05, 2015	Apr. 14, 2015	Sep. 30, 2015
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs			$ 6,100
Creative Circle [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs			5,700
Business Acquisition Contingent Consideration At Fair Value Accrued Earn-Out	$ 13,800
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	$ 4,840
Business Combination, Acquired Receivables, Description	34,386
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets	$ 3,865
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment	5,077
BusinessCombinationRecognizedGoodwill	358,460
Business Combination, Goodwill Recognized, Description	194,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	651
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	601,779
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	12,072
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	12,072
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	$ 589,707
LabResource [Member]
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs			$ 400
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		$ 187
Business Combination, Acquired Receivables, Description		1,643
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets		$ 0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		12
BusinessCombinationRecognizedGoodwill		6,104
Business Combination, Goodwill Recognized, Description		7,528
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets		0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		15,474
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities		1,482
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other		1,882
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		3,364
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net		$ 12,110

Acquisitions Schedule of Intang

Acquisitions Schedule of Intangible Assets Acquired as Part of Business Combination (Details) - USD ($) $ in Thousands	Jun. 05, 2015	Apr. 14, 2015
Creative Circle [Member]
Acquired Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 194,500
Creative Circle [Member] | Trademarks [Member]
Acquired Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	66,100
Creative Circle [Member] | Contractor Relations [Member]
Acquired Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	29,500
Creative Circle [Member] | Customer relations
Acquired Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	90,700
Creative Circle [Member] | Non-compete agreements
Acquired Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	7,300
Creative Circle [Member] | Contract-Based Intangible Assets [Member]
Acquired Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 900
LabResource [Member]
Acquired Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		$ 7,528
LabResource [Member] | Trademarks [Member]
Acquired Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		1,140
LabResource [Member] | Contractor Relations [Member]
Acquired Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		947
LabResource [Member] | Customer relations
Acquired Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		5,421
LabResource [Member] | Non-compete agreements
Acquired Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		20
LabResource [Member] | Contract-Based Intangible Assets [Member]
Acquired Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill		$ 0

Acquisitions Business Acquisiti

Acquisitions Business Acquisition, Pro Forma Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Acquired Indefinite-lived Intangible Assets [Line Items]
Write off of Deferred Debt Issuance Cost	$ 0	$ 0	$ (3,751)	$ 0
Business Acquisition, Pro Forma Revenue			1,601,437	1,456,081
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax			59,986	45,238
Business Acquisition, Pro Forma Net Income (Loss)			$ 86,049	$ 47,980
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Basic			$ 1.14	$ 0.83
Business Acquisition, Pro Forma Earnings Per Share, Basic			1.64	0.88
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted			1.13	0.81
Business Acquisition, Pro Forma Earnings Per Share, Diluted			$ 1.62	$ 0.86
Weighted Average Basic Shares Outstanding, Pro Forma			52,508	54,750
Pro Forma Weighted Average Shares Outstanding, Diluted			53,213	55,629

Discontinued Operations (Detail

Discontinued Operations (Details) - USD ($) $ in Thousands		Feb. 02, 2015	Sep. 30, 2015	Jun. 30, 2015	Sep. 30, 2014	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014		Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses		$ 123,000
Gain (Loss) on Disposition of Business			$ 0		$ 0				$ 25,703	$ 0
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation									14,400
Receivable in escrow			6,000						6,000
Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents											$ (2,854)
Cash			28,916						28,916		28,860
Cash and cash equivalents			28,916		29,881				28,916	29,881	31,714	[1]	$ 37,350
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net											(21,615)
Accounts receivable, net			358,649						358,649		277,146
Disposal Group, Including Discontinued Operation, Prepaid and Other Assets											(1,205)
Prepaid expenses and income taxes			6,526						6,526		13,308
Disposal Group, Including Discontinued Operation, Deferred Tax Asset, Current											(3,321)
Deferred income tax assets			15,298						15,298		15,746
Workers' compensation receivable			13,737						13,737		13,370
Disposal Group, Including Discontinued Operations, Workers' Compensation and Medical Malpractice Receivable, Current											(5,358)
Other current assets			8,978						8,978		2,310	[2]
Disposal Group, Including Discontinued Operation, Other Assets, Current											0
Disposal Group, Including Discontinued Operation, Assets, Current			0						0		34,353
Assets, Current			432,104						432,104		385,093
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment											(2,508)
Property and equipment, net			51,767						51,767		44,311
Goodwill			875,714						875,714		512,060
Identifiable intangible assets, net			429,621						429,621		250,609
Disposal Group, Including Discontinued Operation, Intangible Assets											(11,960)
Disposal Group, Including Discontinued Operation, Goodwill											(58,637)
Disposal Group, Including Discontinued Operation, Other Assets, Noncurrent											(568)
Other non-current assets			7,594						7,594		5,160	[2]
Disposal Group, Including Discontinued Operation, Other Assets			0						0		73,673
Disposal Group, Including Discontinued Operation, Assets											0
Assets			1,796,800						1,796,800		1,270,906
Current portion of long-term debt, net			0						0		17,439	[2]
Disposal Group, Including Discontinued Operation, Accounts Payable											(951)
Accounts payable			6,686						6,686		7,925
Disposal Group, Including Discontinued Operation, Accrued Liabilities											(4,626)
Accrued payroll and contract professional pay			113,219						113,219		82,563
Disposal Group Workers' Compensation and Medical Malpractice Liability, Current											(13,571)
Workers’ compensation loss reserves			15,603						15,603		15,564
Income taxes payable			7,423						7,423		340
Disposal Group, Including Discontinued Operation, Other Liabilities, Current											(1,047)
Other current liabilities			39,218						39,218		20,729
Disposal Group, Including Discontinued Operation, Liabilities, Current			0						0		20,195
Liabilities, Current			182,149						182,149		164,755
Long-term debt, net			784,797						784,797		394,418	[2]
Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities, Noncurrent											(4,088)
Deferred income tax liabilities			66,142						66,142		63,821
Disposal Group, Including Discontinued Operation, Other Liabilities, Noncurrent											(1,479)
Other long-term liabilities			5,124						5,124		7,937
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent			0						0		5,567
Disposal Group, Including Discontinued Operation, Liabilities											0
Liabilities			1,038,212						1,038,212		636,498
Cash Provided by (Used in) Operating Activities, Discontinued Operations							$ (1,778)	$ 1,332
Cash received from sale of discontinued operations, net									115,440	0
Other Cash Provided by (Used in) Investing Activities, Discontinued Operations							14	233
Cash Provided by (Used in) Investing Activities, Discontinued Operations							115,426	(233)
Disposal Group, Including Discontinued Operation, Revenue				$ 0		$ 35,381	12,068	101,998
Disposal Group Including Discontinued Operations Cost of Services				0		24,594	8,653	71,015
Disposal Group, Including Discontinued Operation, Gross Profit (Loss)				0		10,787	3,415	30,983
Disposal Group, Including Discontinued Operation, General and Administrative Expense				(36)		8,113	2,757	24,471
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax				36		2,188	503	4,758
Discontinued Operation, Tax Effect of Discontinued Operation				2		906	143	2,016
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent			$ 34	34	$ 1,282	1,282	360	2,742	$ 360	$ 2,742
Disposal Group Including Discontinued Operations Amortization of Intangible Assets				$ 0		$ 486	$ 155	$ 1,754
Scenario, Previously Reported [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash and cash equivalents											31,714
Accounts receivable, net											298,761
Prepaid expenses and income taxes											14,513
Deferred income tax assets											19,067
Workers' compensation receivable											18,728
Other current assets	[2]										2,310
Disposal Group, Including Discontinued Operation, Assets, Current											0
Assets, Current											385,093
Property and equipment, net											46,819
Goodwill											570,697
Identifiable intangible assets, net											262,569
Other non-current assets	[2]										5,728
Disposal Group, Including Discontinued Operation, Other Assets											0
Assets											1,270,906
Current portion of long-term debt, net	[2]										17,439
Accounts payable											8,876
Accrued payroll and contract professional pay											87,189
Workers’ compensation loss reserves											29,135
Income taxes payable											340
Other current liabilities											21,776
Disposal Group, Including Discontinued Operation, Liabilities, Current											0
Liabilities, Current											164,755
Long-term debt, net	[2]										394,418
Deferred income tax liabilities											67,909
Other long-term liabilities											9,416
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent											0
Liabilities											$ 636,498
[1]	Cash and cash equivalents at December 31, 2014 include $2.9 million from the Physician Segment (see "Note 4. Discontinued Operations").
[2]	The December 31, 2014 balances have been adjusted to reflect unamortized deferred loan costs attributable to term loans as a reduction of the related debt balances whereas they were previously included in other current assets and other non-current assets. This change in presentation was the result of the early adoption of ASU 2015-03. The December 31, 2014 balances for long-term debt and the current portion of long-term debt are now reflected net of $2.5 million and $0.8 million of unamortized deferred loan costs, respectively.

Goodwill and Identifiable Ass33

Goodwill and Identifiable Assets (Goodwill) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Roll Forward]
Gross goodwill	$ 875,714	$ 512,060	$ 514,426
Goodwill	875,714	512,060
Translation adjustment	(910)	(2,366)
Apex
Goodwill [Roll Forward]
Gross goodwill	645,448	287,951	289,712
Translation adjustment	(963)	(1,761)
Oxford
Goodwill [Roll Forward]
Gross goodwill	230,266	224,109	$ 224,714
Translation adjustment	53	$ (605)
Creative Circle [Member]
Goodwill [Roll Forward]
Goodwill, Acquired During Period	358,460
Creative Circle [Member] | Apex
Goodwill [Roll Forward]
Goodwill, Acquired During Period	358,460
Creative Circle [Member] | Oxford
Goodwill [Roll Forward]
Goodwill, Acquired During Period	0
LabResource [Member]
Goodwill [Roll Forward]
Goodwill, Acquired During Period	6,104
LabResource [Member] | Apex
Goodwill [Roll Forward]
Goodwill, Acquired During Period	0
LabResource [Member] | Oxford
Goodwill [Roll Forward]
Goodwill, Acquired During Period	$ 6,104

Goodwill and Identifiable Ass34

Goodwill and Identifiable Assets (Acquired Intangible Assets) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Intangible Assets [Line Items]
Amortization of intangible assets		$ 11,325	$ 5,532	$ 23,151	$ 16,592
Intangible assets subject to amortization:
Gross Carrying Amount		297,752		297,752		$ 163,027
Accumulated Amortization		113,829		113,829		90,743
Net Carrying Amount		183,923		183,923		72,284
Intangible assets not subject to amortization:
Trademarks, Carrying Amount		245,698		245,698		178,325
Goodwill, Carrying Amount		875,714		875,714		512,060
Intangible Assets, Gross (Excluding Goodwill)		543,450		543,450		341,352
Total
Identifiable intangible assets, net		429,621		429,621		250,609
Customer relations
Intangible assets subject to amortization:
Gross Carrying Amount		197,230		197,230		101,141
Accumulated Amortization		67,934		67,934		53,434
Net Carrying Amount		129,296		$ 129,296		47,707
Customer relations | Minimum [Member]
Intangible Assets [Line Items]
Estimated Useful Life				2 years
Customer relations | Maximum [Member]
Intangible Assets [Line Items]
Estimated Useful Life				10 years
Contractor Relations [Member]
Intangible assets subject to amortization:
Gross Carrying Amount		69,806		$ 69,806		39,332
Accumulated Amortization		37,314		37,314		32,021
Net Carrying Amount		32,492		$ 32,492		7,311
Contractor Relations [Member] | Minimum [Member]
Intangible Assets [Line Items]
Estimated Useful Life				2 years
Contractor Relations [Member] | Maximum [Member]
Intangible Assets [Line Items]
Estimated Useful Life				5 years
Non-compete agreements
Intangible assets subject to amortization:
Gross Carrying Amount		10,916		$ 10,916		3,654
Accumulated Amortization		2,755		2,755		1,922
Net Carrying Amount		8,161		$ 8,161		1,732
Non-compete agreements | Minimum [Member]
Intangible Assets [Line Items]
Estimated Useful Life				2 years
Non-compete agreements | Maximum [Member]
Intangible Assets [Line Items]
Estimated Useful Life				7 years
Computer Software, Intangible Asset [Member]
Intangible Assets [Line Items]
Estimated Useful Life				6 years
Intangible assets subject to amortization:
Gross Carrying Amount		18,900		$ 18,900		18,900
Accumulated Amortization		5,729		5,729		3,366
Net Carrying Amount		13,171		$ 13,171		$ 15,534
Contract-Based Intangible Assets [Member]
Intangible Assets [Line Items]
Estimated Useful Life				5 years
Intangible assets subject to amortization:
Gross Carrying Amount	[1]	900		$ 900
Accumulated Amortization	[1]	97		97
Net Carrying Amount	[1]	$ 803		$ 803
[1]	(1) The favorable contracts intangible asset pertains to operating leases which are amortized as rent expense and included in SG&A expenses in the accompanying condensed consolidated statements of operations and comprehensive income. Expense associated with this favorable contracts intangible asset is not significant.

Goodwill and Identifiable Ass35

Goodwill and Identifiable Assets (Future Amortization Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 11,325	$ 5,532	$ 23,151	$ 16,592
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2,014	11,373		11,373
2,015	39,700		39,700
2,016	33,068		33,068
2,017	28,940		28,940
2,018	22,039		22,039
Thereafter	48,803		48,803
Net Carrying Amount	$ 183,923		$ 183,923		$ 72,284

Long-Term Debt Long-Term Debt S

Long-Term Debt Long-Term Debt Schedule (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Secured Debt	$ 804,000	$ 415,125
Unamortized Debt Issuance Expense	(19,203)	(3,300)
Long-term Debt	784,797	411,857
$150 Million Revolving Credit Facility, Due June 2020 [Member]
Debt Instrument [Line Items]
Secured Debt	50,000	0
Term-B Loan Facility repaid June 2015 [Member]
Debt Instrument [Line Items]
Secured Debt	0	180,312
$825 Million Term B Loan Facility, due June 2022 [Member]
Debt Instrument [Line Items]
Secured Debt	754,000	0
$125 million revolving credit facility, repaid June 2015 [Member]
Debt Instrument [Line Items]
Secured Debt	0	76,000
Term-A Loan Facility repaid June 2015 [Member]
Debt Instrument [Line Items]
Secured Debt	$ 0	$ 158,813

Long-Term Debt Debt Future Paym

Long-Term Debt Debt Future Payments (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Debt Disclosure [Abstract]
Secured Debt	$ 804,000	$ 415,125

Long-Term Debt Long-term Debt t

Long-Term Debt Long-term Debt text (Details) $ in Thousands	1 Months Ended	9 Months Ended
	Jun. 15, 2015Rate	Sep. 30, 2015USD ($)	Jun. 30, 2015	Jun. 05, 2015USD ($)	Dec. 31, 2014USD ($)
Debt Instrument [Line Items]
Unamortized Debt Issuance Expense		$ (19,203)			$ (3,300)
Debt, Weighted Average Interest Rate			3.68%
Contractual Quarterly Payments		2,100
Payments on Debt		$ 71,000
$825 Million Term B Loan Facility and $150 Million Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount				$ 975,000
$825 Million Term B Loan Facility, due June 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount				825,000
$150 Million Revolving Credit Facility, Due June 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount				$ 150,000
Maximum [Member]
Debt Instrument [Line Items]
Leverage Ratio		4.50
Leverage Ratio in Latest Year of Debt Term		3.25
Notes Payable to Banks [Member] | Minimum [Member] | $150 Million Revolving Credit Facility, Due June 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate | Rate	0.75%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | Rate	0.00%
Notes Payable to Banks [Member] | Maximum [Member] | $150 Million Revolving Credit Facility, Due June 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate | Rate	2.50%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | Rate	0.00%
Notes Payable to Banks [Member] | Maximum [Member] | Eurodollar [Member] | $825 Million Term B Loan Facility, due June 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate | Rate	3.00%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity		$ 96,300

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Thousands	Sep. 30, 2015USD ($)	Dec. 31, 2014USD ($)
Other Commitments [Line Items]
Workers' Compensation and Medical Malpractice Receivable, Current	$ 13,737	$ 13,370
Self Insurance Reserve	1,900	2,200
Letters of Credit Outstanding, Amount	3,700	3,200
Contingent consideration maximum	41,000
Liability for Uncertain Tax Positions, Noncurrent	900	900
Other current liabilities	$ 39,218	$ 20,729
Number of Leased Properties Owned by Related Parties	2

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Value Inputs, Liabilities, Quantitative Information) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value Inputs, Liabilities, Quantitative Information
Long-term Debt	$ 784,797	$ 411,857
Unamortized Debt Issuance Expense	(19,203)	$ (3,300)
Level 2 Inputs
Fair Value Inputs, Liabilities, Quantitative Information
Long-term debt, fair value	$ 809,500

Fair Value Measurements (Recurr

Fair Value Measurements (Recurring Basis) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Unamortized Debt Issuance Expense	$ 19,203		$ 19,203			$ 3,300
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	18,222	$ 3,000	18,222	$ 3,000	$ 17,326	3,000	$ 3,000	$ 3,667
Contingent consideration maximum	41,000		41,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Acquisitions	0	0	13,814	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Payments	0	0	0	(691)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	896	0	1,408	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	$ 0	0	$ 24
Significant Unobservable Inputs (Level 3) | Recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Contingent consideration to be paid in cash for the acquisitions	$ 18,200		$ 18,200			$ 3,000

Fair Value Measurements (Liabil

Fair Value Measurements (Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Contingent consideration for acquisitions
Balance at beginning of period	$ (17,326)	$ (3,000)	$ (3,000)	$ (3,667)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases	0	0	13,814	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Payments	0	0	0	(691)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	896	0	1,408	0
Foreign currency translation adjustment	0	0	0	(24)
Balance at end of period	$ (18,222)	$ (3,000)	$ (18,222)	$ (3,000)

Stockholders' Equity (Details)

Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2015	Sep. 30, 2015	Sep. 30, 2014
Shares repurchase and retirement [Line Items]
Allocated Share-based Compensation Expense	$ 6,100	$ 4,600		$ 15,200	$ 11,900
Stock Repurchased and Retired During Period, Shares				43,000
Stock Repurchased and Retired During Period, Value				$ 1,600
Stock Issued During Period, Shares, Acquisitions			794,700	794,700
Stock Issued During Period, Value, Acquisitions			$ 30,200	$ 30,200
Additional Paid-in Capital [Member]
Shares repurchase and retirement [Line Items]
Stock Repurchased and Retired During Period, Value				400
Retained Earnings [Member]
Shares repurchase and retirement [Line Items]
Stock Repurchased and Retired During Period, Value				$ 1,200

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Accumulated Other Comprehensive Income [Abstract]
Accumulated other comprehensive loss	$ (7,054)		$ (7,054)		$ (4,570)
Foreign currency translation adjustment, net of tax	290	$ (2,884)	(2,606)	$ (3,088)
Changes in fair value of derivatives, net of tax	$ 0	$ 19	$ 122	$ 70

Stock-based compensation (Detai

Stock-based compensation (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Deferred Compensation Arrangement with Individual, Share-based Payments
Allocated Share-based Compensation Expense	$ 6.1		$ 4.6	$ 15.2	$ 11.9
2010 Employee Stock Purchase Plan (ESPP)
Deferred Compensation Arrangement with Individual, Share-based Payments
Employee stock purchase plan shares issued during period	79,300	125,101
Physician Segment [Member]
Deferred Compensation Arrangement with Individual, Share-based Payments
Allocated Share-based Compensation Expense	$ 0.1				$ 0.4

Earnings per share (Details)

Earnings per share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Weighted Average Number of Shares Outstanding Reconciliation
Weighted average number of common shares outstanding used to compute basic earnings per share	52,654	53,374	52,053	53,955
Dilutive effect of stock-based awards	650	755	706	849
Number of shares used to compute diluted earnings per share	53,304	54,129	52,759	54,804

Segment Reporting (Segment Repo

Segment Reporting (Segment Reporting Information) (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015USD ($)	Sep. 30, 2014USD ($)	Sep. 30, 2015USD ($)segment	Sep. 30, 2014USD ($)
Revenues:
Revenues	$ 572,123	$ 442,443	$ 1,487,491	$ 1,283,718
Revenue as Percentage of Consolidated Revenue	100.00%	100.00%	100.00%	100.00%
Gross Profit:
Total Gross Profit	$ 191,404	$ 144,838	$ 485,813	$ 414,898
Operating Income (Loss):
Total Operating Income	51,465	38,698	109,246	101,975
Amortization of Intangible Assets	11,325	5,532	$ 23,151	16,592
Reportable segments (in number of segments) | segment			2
Corporate Segment [Member]
Operating Income (Loss):
Total Operating Income	(15,937)	(14,102)	$ (49,870)	(39,951)
Amortization of Intangible Assets	0	0	0	8
Apex
Revenues:
Revenues	421,067	306,027	1,054,064	882,328
Gross Profit:
Total Gross Profit	128,731	87,323	306,026	247,506
Operating Income (Loss):
Total Operating Income	48,119	33,735	105,258	88,227
Amortization of Intangible Assets	9,732	4,089	18,638	12,267
Oxford
Revenues:
Revenues	151,056	136,416	433,427	401,390
Gross Profit:
Total Gross Profit	62,673	57,515	179,787	167,392
Operating Income (Loss):
Total Operating Income	19,283	19,065	53,858	53,699
Amortization of Intangible Assets	1,593	1,443	4,513	4,317
Physician Segment [Member]
Operating Income (Loss):
Total Operating Income		276		1,042
Domestic [Member]
Revenues:
Revenues	$ 546,747	$ 421,640	$ 1,420,492	$ 1,223,217
Revenue as Percentage of Consolidated Revenue	95.60%	95.30%	95.50%	95.30%
Assignment [Member]
Revenues:
Revenues	$ 539,383	$ 419,990	$ 1,402,116	$ 1,220,800
Revenue as Percentage of Consolidated Revenue	94.30%	94.90%	94.30%	95.10%
Direct hire and conversion fees [Member]
Revenues:
Revenues	$ 32,740	$ 22,453	$ 85,375	$ 62,918
Revenue as Percentage of Consolidated Revenue	5.70%	5.10%	5.70%	4.90%

Segment Reporting (Revenue by G

Segment Reporting (Revenue by Geographical Areas) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues from External Customers [Line Items]
Revenues	$ 572,123	$ 442,443	$ 1,487,491	$ 1,283,718
Revenue as Percentage of Consolidated Revenue	100.00%	100.00%	100.00%	100.00%
Domestic [Member]
Revenues from External Customers [Line Items]
Revenues	$ 546,747	$ 421,640	$ 1,420,492	$ 1,223,217
Revenue as Percentage of Consolidated Revenue	95.60%	95.30%	95.50%	95.30%
Foreign [Member]
Revenues from External Customers [Line Items]
Revenues	$ 25,376	$ 20,803	$ 66,999	$ 60,501
Revenue as Percentage of Consolidated Revenue	4.40%	4.70%	4.50%	4.70%
Assignment [Member]
Revenues from External Customers [Line Items]
Revenues	$ 539,383	$ 419,990	$ 1,402,116	$ 1,220,800
Revenue as Percentage of Consolidated Revenue	94.30%	94.90%	94.30%	95.10%
Direct hire and conversion fees [Member]
Revenues from External Customers [Line Items]
Revenues	$ 32,740	$ 22,453	$ 85,375	$ 62,918
Revenue as Percentage of Consolidated Revenue	5.70%	5.10%	5.70%	4.90%