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Business Acquisitions (Allocation of Aggregate Purchase Price) (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill | $ 1,539,663 | $ 1,591,474 |
Fiscal 2022 Acquisitions |  |  |
Business Acquisition [Line Items] |  |  |
Accounts receivable |  |  | $ 7,433
Prepaid expenses and other current assets |  |  | 4,915
Property and equipment |  |  | 369
Operating lease right-of-use assets, noncurrent |  |  | 546
Goodwill |  |  | 93,827
Other long-term assets |  |  | 11
Accounts payable and accrued expenses |  |  | (4,656)
Deferred revenue |  |  | (21,332)
Deferred tax liability |  |  | (10,436)
Other long-term liabilities |  |  | (516)
Total |  |  | 121,704
Fiscal 2022 Acquisitions | Trade names |  |  |
Business Acquisition [Line Items] |  |  |
Finite-lived intangible assets |  |  | 12,838
Fiscal 2022 Acquisitions | Customer relationships |  |  |
Business Acquisition [Line Items] |  |  |
Finite-lived intangible assets |  |  | 20,540
Fiscal 2022 Acquisitions | Other intangibles |  |  |
Business Acquisition [Line Items] |  |  |
Finite-lived intangible assets |  |  | $ 18,165

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