Income Taxes (Schedule of Components of Income Tax (Benefit)/Expense) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
U.S. federal statutory tax rate, continuing operations, percent		28.00%	28.00%	31.00%
Income tax based on income from continuing operations, at estimated tax rates of 28%, 28%, and 31%, respectively		$ 39,544	$ 49,977	$ 36,044
Income tax before discrete items		39,544	49,977	36,044
Discrete tax expense/(benefit):
Net impact of mandatory deemed repatriation		0	0	(1,003)
Provision for/resolution of tax audits and contingencies, net	$ (1,500)	752	(2,874)	1,286
Adjustments to prior period tax liabilities		(2,420)	(1,637)	(1,284)
Provision for/adjustment to beginning of year valuation allowances		168	(525)	(4,882)
Enacted tax legislation		0	(112)	2,067
Tax effect of non-deductible foreign exchange loss on intercompany loan		3,801	0	0
Other		(14)	0	0
Total income tax expense		$ 41,831	$ 44,829	$ 32,228