Income Taxes (Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Lease liabilities	$ 205,487	$ 206,091
Deferred compensation	82,593	81,457
Receivable reserves	52,342	47,308
Unrealized loss on investments	51,549	62,318
Net operating loss carryforwards	45,879	28,997
Accrued expenses	15,457	25,833
Total deferred tax assets	453,307	452,004
Valuation allowance	(46,843)	(24,779)
Deferred tax assets	406,464	427,225
Lease right-of-use assets	(195,962)	(199,085)
Goodwill and other intangibles	(72,927)	(61,225)
Prepaid expenses	(6,966)	(4,427)
Depreciation	(3,620)	(1,180)
Other	(5,467)	(2,101)
Total deferred tax liabilities	(284,942)	(268,018)
Net deferred tax asset	$ 121,522	$ 159,207