Income Taxes (Schedule Of Components Of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
U.S. federal, Current	$ 104,924	$ 92,035	$ 82,556
State and local, Current	15,174	14,798	12,323
Current, income tax expense (benefit)	120,098	106,833	94,879
U.S. federal, Deferred	22,184	(14,055)	11,388
State and local, Deferred	3,429	(5,485)	2,807
Deferred, income tax expense (benefit)	25,613	(19,540)	14,195
U.S. federal, Total	127,108	77,980	93,944
State and local, Total	18,603	9,313	15,130
Total income tax expense	$ 145,711	$ 87,293	$ 109,074