Business Segments (Tables)

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Reconciliation of Revenue and Operating Income by Reportable Segment to Consolidated Results

The following table provides a reconciliation of revenue and operating income by reportable segment to consolidated results for the three and nine months ended September 30, 2016 and 2015 (in thousands):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2016			2015			2016			2015
Net service revenues
Temporary and consultant staffing	$	1,016,248		$	999,822		$	3,057,496		$	2,922,942
Permanent placement staffing	105,117			110,748			324,845			319,744
Risk consulting and internal audit services	217,176			202,148			602,985			547,653
	$	1,338,541		$	1,312,718		$	3,985,326		$	3,790,339
Operating income
Temporary and consultant staffing	$	97,786		$	102,991		$	302,802		$	300,404
Permanent placement staffing	20,286			24,377			66,364			67,460
Risk consulting and internal audit services	28,295			31,698			60,596			68,451
	146,367			159,066			429,762			436,315
Amortization of intangible assets	326			—			928			—
Interest income, net	(283		)	(240		)	(695		)	(400		)
Income before income taxes	$	146,324		$	159,306		$	429,529		$	436,715