Revenue by Geographic Area (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 988,465	$ 942,753	$ 936,021
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	367,937	354,433	320,327
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	120,160	104,299	108,757
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	99,814	94,546	99,714
South Korea
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	56,790	55,142	55,606
France
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	49,294	49,444	58,785
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	13,284	13,314	14,034
Other European
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	139,813	145,985	159,011
Other international
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 141,373	$ 125,590	$ 119,787