Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2016	[1]	Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	[1]	Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal																	$ 31,409	$ 41,002	$ 20,374
State																	3,819	5,227	2,443
Foreign																	4,639	3,651	2,953
Total																	39,867	49,880	25,770
Deferred:
Federal																	(2,229)	(14,611)	1,139
State																	276	(1,147)	837
Foreign																	(797)	(348)	(1,935)
Total																	(2,750)	(16,106)	41
Total income tax provision	$ 6,814		$ 12,265		$ 6,448		$ 11,590		$ 5,573		$ 11,196		$ 9,652		$ 7,353		$ 37,117	$ 33,774	$ 25,811

[1] Fluctuations in our effective income tax rate between quarters generally relates to the accounting for discrete income tax items in any given quarter, and revisions of estimates for certain income tax components during the year. •For 2016: Our effective income tax rates for the first, second, third, and fourth quarters were 35%, 37%, 41%, and 35%, respectively. •For 2015: Our effective income tax rates for the first, second, third, and fourth quarters were 44%, 43%, 40%, and 19%, respectively. The low fourth quarter rate can be mainly attributed to full year impact of the 2015 R&D tax credits, as the legislation was not passed until December 2015.