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Income Taxes (Provision For Income Taxes/(Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Components Of Income Tax Expense Benefit Continuing Operations [Abstract]
Current taxes: Federal	$ 167,258	$ 143,859	$ 123,802
Current taxes: State	39,911	42,705	30,464
Current taxes: Foreign	2,950	(236)	1,684
Current taxes: Total	210,119	186,328	155,950
Deferred taxes: Federal	19,747	(31,019)	(7,027)
Deferred taxes: State	5,640	(5,803)	4,266
Deferred taxes: Foreign	6,717	(1,818)	(4,037)
Deferred Income Tax Expense (Benefit), Total	32,104	(38,640)	(6,798)
Provision for income taxes	$ 242,223	$ 147,688	$ 149,152

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