Income Taxes (Reconciliation Of The Statutory Federal Income Tax With The Company's Effective Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Statutory rate	$ 148,405	$ 185,874	$ 224,087
State income taxes, net of federal income tax	34,012	42,813	37,169
Non-deductible business expenses	25,177	10,944	9,732
Change in valuation allowance	21,931	9,802	2,248
Foreign tax rate difference	(2,471)	(2,846)	125
Federal tax credits	(7,002)	(2,793)	(2,126)
Excess tax benefit from stock-based compensation	(31,109)	(19,418)	(32,004)
Other, net	(4,787)	(1,415)	2,992
Provision for income taxes	$ 184,156	$ 222,961	$ 242,223