Segment Information - Additional Details by Geographical Location (Details) - 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 property and equipment, net	$ 32,309	$ 36,178	$ 35,254
Total revenues	484,559	440,900	380,585
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property and equipment, net	29,506	35,335	35,254
Total revenues	403,375	394,234	334,412
Non-US
Revenues from External Customers and Long-Lived Assets [Line Items]
Total property and equipment, net	2,803	843	0
Total revenues	$ 81,184	$ 46,666	$ 46,173