Income Taxes - Current and Deferred (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal										$ (9,918)	$ 5,731	$ 4,802
State										(624)	(1,645)	4,823
Foreign										8,975	12,647	9,449
Total										(1,567)	16,733	19,074
Deferred:
Federal										(12,687)	13,665	(4,701)
State										(2,217)	2,570	1,026
Foreign										(851)	(3,312)	(1,304)
Total										(15,755)	12,923	(4,979)
Total, income tax expense (benefit)	$ 6,500	$ (7,862)	$ (3,887)	$ (4,441)	$ (1,132)	$ 22,308	$ 480	$ 1,261	$ 5,607	(17,322)	29,656	14,095
Components of income (loss) before income taxes
U.S.										(81,579)	51,797	15,779
Foreign										38,339	69,429	49,208
(Loss) income before income tax (benefit) expense		(2,146)	$ (27,798)	$ (9,658)	$ (3,638)	104,645	$ 3,190	$ (8,949)	$ 22,340	(43,240)	121,226	$ 64,987
Deferred tax assets:
Compensation and benefits	13,742	9,715				13,742				9,715	13,742
Net operating loss and capital loss carryover	16,094	19,755				16,094				19,755	16,094
Share-based compensation	6,488	6,824				6,488				6,824	6,488
Research and development credits	3,069	7,550				3,069				7,550	3,069
Foreign tax credits		12,660								12,660
Tax benefits on uncertain tax positions	2,862	1,351				2,862				1,351	2,862
Goodwill and other intangibles	9,483	8,015				9,483				8,015	9,483
Depreciation		1,167								1,167
Other	5,063	5,259				5,063				5,259	5,063
Total deferred tax assets	56,801	72,296				56,801				72,296	56,801
Less: valuation allowance	(19,444)	(20,979)				(19,444)				(20,979)	(19,444)
Total deferred tax assets, net of valuation allowance	37,357	51,317				37,357				51,317	37,357
Deferred tax liabilities:
Depreciation	(1,281)					(1,281)					(1,281)
Capitalized software	(12,072)	(12,174)				(12,072)				(12,174)	(12,072)
Other	(414)	(455)				(414)				(455)	(414)
Total deferred tax liabilities	(13,767)	(12,629)				(13,767)				(12,629)	(13,767)
Net deferred tax assets	$ 23,590	$ 38,688				$ 23,590				38,688	$ 23,590
Increase in valuation allowance										$ 1,500