Income Taxes (Schedule Of Components Of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
U.S. federal, Current	$ 96,849	$ 104,924	$ 92,035
State and local, Current	13,793	15,174	14,798
Current, income tax expense (benefit)	110,642	120,098	106,833
U.S. federal, Deferred	19,990	22,184	(14,055)
State and local, Deferred	1,726	3,429	(5,485)
Deferred, income tax expense (benefit)	21,716	25,613	(19,540)
U.S. federal, Total	116,839	127,108	77,980
State and local, Total	15,519	18,603	9,313
Total income tax expense	$ 132,358	$ 145,711	$ 87,293