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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended			36 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2017
Effective income tax rate	19.70%	(21.10%)	23.60%
Interest expense related to uncertain tax positions	$ 180	$ 554	$ 1,853
Interest on income taxes accrued	356	2,185
Lapsing of statutes of limitations	$ 6,833	$ 3,186	$ 209
Statutory U.S. federal income tax rate	21.00%	21.00%	21.00%	35.00%
Income tax expense/(benefit) from tax rate change	$ (14,431)	$ (110,765)
Deferment of employer-paid social security taxes		70,812
CARES Act, employee retention credits	11,445	3,403
Foreign Tax Authority [Member]
Gross NOLS	108,324	98,710
Valuation allowances of deferred tax assets	119,741	104,820
State and Local Jurisdiction [Member]
Gross NOLS	50,467	$ 340,259
Domestic Tax Authority [Member]
Lapsing of statutes of limitations	$ 826

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