Segment Information (Tables)

6 Months Ended

Jun. 30, 2017

Segment Reporting [Abstract]

Schedule of Geographical Areas of Which Company Operates

The following table presents information about geographic areas in which the Company operates (in thousands):

	Three Months Ended   June 30,				Six Months Ended   June 30,
	2017		2016		2017		2016
Revenues(1):
United States	$	173,613	$	166,112	$	343,929	$	336,843
International
Europe(2)	94,754		100,403		172,692		197,763
Other foreign countries	22,550		22,927		46,237		43,853
	117,304		123,330		218,929		241,616
Total	$	290,917	$	289,442	$	562,858	$	578,459

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(1) Revenues are attributed to countries based on location of customer.

(2) Based on the financial information that is used to produce the general-purpose financial statements, providing further geographic information is impracticable.