Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Net cash payments for income taxes	$ 16,996	$ 8,168	$ 15,574
Change in tax rate, income tax expense		3,600	3,800
Transition tax for accumulated foreign earnings, provisional income tax expense			7,600
US tax reform - revaluation of deferred taxes	0	102	(3,756)
Valuation allowance, foreign		7,000
Release of transition tax of uncertain tax positions and adjustments	0	3,496	(7,550)
Estimated tax over book differences	61,000
Loss carryforwards	26,034
Unrecognized tax benefits, loss carryforwards	511
Operating loss carryforwards, not subject to expiration	16,342
Operating loss carryforwards, subject to expiration	$ 9,692
Operating loss carryforwards, expiration period	20 years
Unrecognized tax benefits, interest on income taxes accrued	$ 256	256	275
Unrecognized tax benefits that would impact effective tax rate	1,940	$ 5,493	$ 9,389
Reductions to unrecognized income tax benefits	$ 1,240