Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Difference between income tax provision computed at the statutory Federal income tax rate and financial statement income tax
Provision at Federal rate of 21% for 2019 and 2018, 35% for 2017)									$ 22,202	$ 18,267	$ 30,699
State income taxes, net of Federal impact									2,792	2,985	1,850
Research and experimentation credits									(3,314)	(4,040)	(2,853)
Stock award vesting									(3,661)	(1,513)	(7,882)
Tax uncertainties									(56)	(122)	166
Section 199 manufacturing deduction										168	(962)
Section 162(m) compensation limitation									978	951	273
Foreign rate differential									930	1,238	162
Valuation allowance for deferred tax assets									(495)	(177)	2,351
Other impact of foreign operations									2,635	2,755	3,933
Statutory rate change									(10)	(87)	(2,210)
Other									952	432	819
Total income tax provision	$ 1,633	$ 7,262	$ 7,458	$ 6,600	$ 4,669	$ 4,391	$ 5,607	$ 6,190	$ 22,953	$ 20,857	$ 26,346