Segment Reporting

3 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Segment Reporting

10. Segment Reporting

On Assignment provides services through two operating segments, the Apex Segment and the Oxford Segment, with each addressing different sectors of the professional staffing market with distinct business models attuned to those sectors. The Apex Segment provides a broad spectrum of technical, scientific, digital and creative professionals for contract, contract-to-hire and permanent placement positions to Fortune 1000 and mid-market clients across the United States and Canada. Businesses in this segment include Apex Systems, Apex Life Sciences and Creative Circle. The Oxford Segment provides specialized staffing, permanent placement and consulting services in select skill and geographic markets. Businesses in this segment include Oxford Global Resources, CyberCoders and Life Sciences Europe.

The Company’s management evaluates the performance of each segment primarily based on revenues, gross profit and operating income. The information in the following tables is derived directly from the segments’ internal financial reporting used for corporate management purposes. The Company's management does not evaluate, manage or measure performance of segments using asset information and such information is not readily available. Accordingly, assets by reportable segment are not disclosed.

The following tables present revenues, gross profit, operating income and amortization by reportable segment (in thousands):

	Three Months Ended
	March 31, 2017
	Apex		Oxford		Corporate(1)			Total
Revenues	$	482,515	$	144,013	$	—		$	626,528
Gross profit	139,919		58,225		—			198,144
Operating income	46,893		8,663		(11,948		)	43,608
Amortization	7,527		937		—			8,464

	Three Months Ended
	March 31, 2016
	Apex		Oxford		Corporate(1)			Total
Revenues	$	433,155	$	148,885	$	—		$	582,040
Gross profit	126,144		61,638		—			187,782
Operating income	39,986		12,760		(14,989		)	37,757
Amortization	8,590		1,554		—			10,144

(1) Corporate expenses primarily consist of consolidated stock-based compensation expense, compensation for corporate employees, acquisition, integration and strategic planning expenses, public company expenses and depreciation expense for corporate assets.

The following table presents revenues by type (in thousands):

	Three Months Ended
	March 31,
	2017		%		2016		%
Revenues:
Assignment	$	594,515	94.9	%	$	549,552	94.4	%
Permanent placement	32,013		5.1	%	32,488		5.6	%
	$	626,528	100.0	%	$	582,040	100.0	%

The Company operates internationally, with operations mainly in the United States, Europe and Canada. The following table presents revenues by geographic location (in thousands):

	Three Months Ended
	March 31,
	2017		%		2016		%
Revenues:
Domestic	$	596,301	95.2	%	$	554,438	95.3	%
Foreign	30,227		4.8	%	27,602		4.7	%
	$	626,528	100.0	%	$	582,040	100.0	%