Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Schedule of Revenue Disaggregated by Line of Business

The following table presents the Company's revenues disaggregated by line of business (in thousands):

	Three Months Ended   June 30,						Six Months Ended   June 30,
	2018			2017			2018		2017
Accountemps		$	480,563		$	439,734	$	952,152		$	876,273
OfficeTeam		268,362			244,369		529,514			480,548
Robert Half Technology		171,446			157,832		331,508			315,271
Robert Half Management Resources		167,603			156,361		341,088			313,810
Temporary and consulting staffing		1,087,974			998,296		2,154,262			1,985,902
Permanent placement staffing		135,038			112,653		256,438			216,286
Risk consulting and internal audit services		234,042			197,479		441,687			393,610
Net service revenues		$	1,457,054		$	1,308,428	$	2,852,387		$	2,595,798

Schedule of Contract Liability Activity

The following table sets forth the activity in contract liabilities from January 1, 2018 through June 30, 2018 (in thousands):

	June 30, 2018
Balance at beginning of period		$	9,003
Payments in advance of satisfaction of performance obligations		8,893
Revenue recognized		(7,471		)
Other, including translation adjustments		(2,052		)
Balance at end of period		$	8,373