Business Segment and Geographic Region Information - Revenue and Long-Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue and long-lived assets by geographic region
Revenue	$ 70,458	$ 79,317	$ 78,437	$ 73,283	$ 62,530	$ 38,531	$ 41,150	$ 60,840	$ 301,495	$ 203,051	$ 195,632
Long-Lived Assets	42,063				40,300				42,063	40,300	44,904
United States.
Revenue and long-lived assets by geographic region
Revenue									226,890	126,255	116,969
Long-Lived Assets	41,729				40,001				41,729	40,001	44,424
Europe
Revenue and long-lived assets by geographic region
Revenue									24,209	29,140	27,933
Asia Pacific
Revenue and long-lived assets by geographic region
Revenue									50,396	47,656	50,730
Long-Lived Assets	$ 334				$ 299				334	299	480
International | Revenue | Geographic concentration risk
Revenue and long-lived assets by geographic region
Revenue									$ 256,500	$ 162,400	$ 149,400
Percentage of revenue									85.10%	80.00%	76.40%