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Summary Of Significant Accounting Policies (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Loan impairment threshold period | 90 days |
Threshold of reporting unit goodwill carrying value for further analysis | $ 0 |
Goodwill impairment charges | 0 |
Allowance for doubtful accounts | 19,800,000 | $ 19,600,000
Incremental payments due upon termination of contract | 0 |
Operating lease right-of-use assets, net | 775,949,000 | 750,734,000
Lease liabilities | $ 819,682,000 | $ 799,100,000
Operating Lease, Liability, Statement of Financial Position [Extensible List] | Accounts payable and accrued expenses | Accounts payable and accrued expenses
Office Equipment [Member] | Minimum [Member] |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Fixed assets, Useful life | 2 years |
Office Equipment [Member] | Maximum [Member] |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Fixed assets, Useful life | 7 years |
Building and Building Improvements [Member] | Minimum [Member] |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Fixed assets, Useful life | 3 years |
Building and Building Improvements [Member] | Maximum [Member] |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Fixed assets, Useful life | 39 years |
ASU 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment |  |
New Accounting Pronouncements Or Change In Accounting Principle [Line Items] |  |
Cumulative adjustments for accounting changes | $ 7,800,000 |

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