Acquisitions Aquisitions (Tables)

6 Months Ended

Jun. 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.

	Six months ended June 30,
	2015		2014
Revenues	$	1,029,314	$	951,357
Income from continuing operations	$	35,095	$	24,526
Net income	$	61,124	$	25,986
Basic earnings per share:
Income from continuing operations	$	0.67	$	0.45
Net income	$	1.16	$	0.47
Diluted earnings per share:
Income from continuing operations	$	0.66	$	0.44
Net income	$	1.15	$	0.46
Weighted average number of shares outstanding	52,543		55,034
Weighted average number of shares and dilutive shares outstanding	53,273		55,915

ScheduleOfPurchasePriceAllocationTableTextBlock [Table Text Block]

The following tables summarize (in thousands) the purchase price allocations for the acquisitions of Creative Circle and LabResource:

	2015 Acquisitions
	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	361,746		6,104
Identifiable intangible assets	194,500		7,528
Other	651		—
Total assets acquired	$	605,065	$	15,474
Current liabilities	$	12,072	$	1,482
Other	—		1,882
Total liabilities assumed	12,072		3,364
Total purchase price	$	592,993	$	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
		2015 Acquisitions
	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