Geographic Information (Tables)

12 Months Ended

Dec. 31, 2015

Segment Reporting [Abstract]

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area

Revenue by geographic area is as follows:

	Year Ended December 31,
(in thousands)	2015		2014		2013
United States	$	354,433	$	320,327	$	292,323
Japan	104,299		108,757		108,064
Germany	94,546		99,714		93,525
South Korea	55,142		55,606		43,585
France	49,444		58,785		56,310
Canada	13,314		14,034		14,163
Other European	145,985		159,011		145,304
Other international	125,590		119,787		107,986
Total revenue	$	942,753	$	936,021	$	861,260

Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country

Property and equipment by geographic area is as follows:

	December 31,
(in thousands)	2015		2014
United States	$	47,971	$	49,957
Europe	6,808		7,840
India	3,286		3,123
Other international	3,859		3,723
Total property and equipment	$	61,924	$	64,643