Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (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
Difference between income tax provision computed at the statutory Federal income tax rate and financial statement income tax related to continuing operations
Provision at Federal rate of 35%																	$ 35,000	$ 33,719	$ 21,533
State income taxes, net of Federal impact																	2,662	2,652	2,132
Research and experimentation credits																	(71)	(2,135)	(450)
Tax uncertainties																	(1,597)	(166)	187
Section 199 manufacturing deduction																	(4,060)	(2,884)	(1,936)
Foreign rate differential																	857	688	2,847
Valuation allowance for deferred tax assets																	1,287	919	3,602
Other impact of foreign operations																	2,157	283	(3,555)
Other																	882	698	1,451
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.