Segment and Geographical Information - Additional Details by Geographical Location (Details) - 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 property and equipment, net	$ 42,011	$ 32,309	$ 36,178
Total revenues	692,623	484,559	440,900
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property and equipment, net	36,497	29,506	35,335
Total revenues	591,566	403,375	394,234
Non-US
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property and equipment, net	5,514	2,803	843
Total revenues	$ 101,057	$ 81,184	$ 46,666