Income Taxes (Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Lease liabilities	$ 206,091	$ 187,576
Deferred compensation	81,457	79,081
Unrealized loss on investments	62,318	0
Receivable reserves	47,308	38,432
Net operating loss carryforwards	28,997	24,837
Accrued expenses	25,833	46,539
Depreciation	0	1,302
Other	0	4,155
Total deferred tax assets	452,004	381,922
Valuation allowance	(24,779)	(14,515)
Deferred tax assets	427,225	367,407
Lease right-of-use assets	(199,085)	(186,168)
Goodwill and other intangibles	(61,225)	(54,887)
Prepaid expenses	(4,427)	(7,228)
Depreciation	(1,180)	0
Unrealized gain on investments	0	(7,841)
Other	(2,101)	0
Total deferred tax liabilities	(268,018)	(256,124)
Net deferred tax asset	$ 159,207	$ 111,283