Business Segments (Tables)

6 Months Ended

Jun. 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 six months ended June 30, 2016 and 2015 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2016			2015			2016			2015
Net service revenues
Temporary and consultant staffing	$	1,032,083		$	979,602		$	2,041,248		$	1,923,120
Permanent placement staffing	113,439			110,583			219,728			208,996
Risk consulting and internal audit services	198,638			181,873			385,809			345,505
	$	1,344,160		$	1,272,058		$	2,646,785		$	2,477,621
Operating income
Temporary and consultant staffing	$	107,133		$	104,612		$	205,016		$	197,413
Permanent placement staffing	24,576			24,052			46,078			43,083
Risk consulting and internal audit services	17,788			20,483			32,301			36,753
	149,497			149,147			283,395			277,249
Amortization of intangible assets	314			—			602			—
Interest income, net	(231		)	(88		)	(412		)	(160		)
Income before income taxes	$	149,414		$	149,235		$	283,205		$	277,409