Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
U.S. federal statutory rate			35.00%
Tax at the U.S. federal statutory rate	$ 47,168	$ 43,115	$ 60,309
State income tax, net of federal tax benefit of $652, $644 and $586, respectively	2,452	2,422	1,087
Federal Income tax provision (benefit) for state income taxes	652	644	586
Net incremental income tax expense (benefit) from foreign earnings (1)	6,314	6,031	(5,442)
Net tax benefit resulting from the enactment of the Tax Act	0	(1,494)	(27,269)
Non-deductible compensation expense	2,074	1,827	0
Other taxes and adjustments, net	1,985	202	(265)
Provision for income taxes	$ 59,993	$ 52,103	$ 28,420
Effective tax rate	26.70%	25.40%	16.50%
Foreign inflation index adjustment	$ 2,300	$ 3,300	$ 4,000