Business Segments (Tables)

6 Months Ended

Jun. 30, 2015

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, 2015 and 2014 (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2015			2014			2015			2014
Net service revenues
Temporary and consultant staffing	$	979,602		$	911,038		$	1,923,120		$	1,768,608
Permanent placement staffing	110,583			102,827			208,996			195,452
Risk consulting and internal audit services	181,873			151,049			345,505			285,196
	$	1,272,058		$	1,164,914		$	2,477,621		$	2,249,256
Operating income
Temporary and consultant staffing	$	104,612		$	88,756		$	197,413		$	166,241
Permanent placement staffing	24,052			22,448			43,083			39,723
Risk consulting and internal audit services	20,483			12,449			36,753			19,798
	149,147			123,653			277,249			225,762
Amortization of intangible assets	—			224			—			557
Interest income, net	(88		)	(224		)	(160		)	(462		)
Income before income taxes	$	149,235		$	123,653		$	277,409		$	225,667