Income Taxes (Schedule of Components of Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current expense:
Federal	$ 19,751	$ 86,977	$ 81,459
State	10,360	17,733	12,657
Foreign	25,990	23,845	24,608
Current expense (benefit)	56,101	128,555	118,724
Deferred expense (benefit):
Federal	24,923	(2,979)	(2,216)
State	2,715	(405)	(98)
Foreign	6,372	26,543	(36,602)
Deferred expense (benefit)	34,010	23,159	(38,916)
Tax expense (benefit) relating to uncertain tax positions, including accrued interest	4,282	(6,323)	(1,338)
Income tax expense	$ 94,393	$ 145,391	$ 78,470