Revenue by Geographic Area (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 942,753	$ 936,021	$ 861,260
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	354,433	320,327	292,323
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	104,299	108,757	108,064
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	94,546	99,714	93,525
South Korea
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	55,142	55,606	43,585
France
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	49,444	58,785	56,310
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	13,314	14,034	14,163
Other European
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	145,985	159,011	145,304
Other International
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 125,590	$ 119,787	$ 107,986