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Income Taxes (Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Components Of Income Tax Expense Benefit Continuing Operations [Abstract] |  |
Lease liabilities | $ 187,576 | $ 211,524
Deferred compensation | 79,081 | 79,068
Accrued expenses | 46,539 | 73,835
Receivable reserves | 38,432 | 41,963
Net operating loss carryforwards | 24,837 | 32,727
Depreciation | 1,302 |
Other | 4,155 | 3,311
Total deferred tax assets | 381,922 | 442,428
Valuation allowance | (14,515) | (11,740)
Deferred tax assets | 367,407 | 430,688
Lease ROU asset | (186,168) | (210,670)
Goodwill and other intangibles | (54,887) | (51,189)
Unrealized gain on investments | (7,841) | (11,585)
Prepaid expenses | (7,228) | (5,396)
Depreciation |  | (15,371)
Total deferred tax liabilities | (256,124) | (294,211)
Net deferred tax asset | $ 111,283 | $ 136,477

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