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Business Acquisitions (Allocation of Aggregate Purchase Price) (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021 | Jun. 30, 2021 | Jun. 04, 2021
--- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |
Goodwill | $ 1,603,340 | $ 1,531,455 |  |
Fiscal 2022 Acquisitions |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Accounts receivable | 6,703 |  |  |
Prepaid expenses and other current assets | 897 |  |  |
Property and equipment | 370 |  |  |
Goodwill | 81,725 |  |  |
Other long-term assets | 11 |  |  |
Accounts payable and accrued expenses | (3,383) |  |  |
Deferred revenue | (19,274) |  |  |
Deferred tax liability | (10,485) |  |  |
Other long-term liabilities | (326) |  |  |
Total | 107,140 |  |  |
Fiscal 2022 Acquisitions | Trade names |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible assets | 11,902 |  |  |
Fiscal 2022 Acquisitions | Customer relationship |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible assets | 22,170 |  |  |
Fiscal 2022 Acquisitions | Other intangibles |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible assets | $ 16,830 |  |  |
Fiscal 2021 Acquisitions |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Accounts receivable |  |  | $ 3,278 |
Prepaid expenses and other current assets |  |  | 2,512 |
Property and equipment |  |  | 1,838 |
Operating lease right-of-use assets, noncurrent |  |  | 5,888 |
Goodwill |  |  | 55,439 |
Other long-term assets |  |  | 62 |
Deferred tax asset |  |  | 231 |
Accounts payable and accrued expenses |  |  | (2,656) |
Other current liabilities |  |  | (14) |
Deferred revenue |  | $ (9,500) | (7,048) |
Operating lease liabilities, current |  |  | (7,191) |
Deferred tax liability |  |  | (4,122) |
Other long-term liabilities |  |  | (1,491) |
Total |  |  | 90,970 |
Fiscal 2021 Acquisitions | Trade names |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible assets |  |  | 10,007 |
Fiscal 2021 Acquisitions | Customer relationship |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible assets |  |  | 5,000 |
Fiscal 2021 Acquisitions | Other intangibles |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible assets |  |  | $ 29,237 |
SEOmoz Acquisition |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Accounts receivable |  |  |  | $ 3,278
Prepaid expenses and other current assets |  |  |  | 2,512
Property and equipment |  |  |  | 1,838
Operating lease right-of-use assets, noncurrent |  |  |  | 5,888
Goodwill |  |  |  | 41,192
Other long-term assets |  |  |  | 62
Deferred tax asset |  |  |  | 235
Accounts payable and accrued expenses |  |  |  | (2,656)
Other current liabilities |  |  |  | (14)
Deferred revenue |  |  |  | (7,048)
Operating lease liabilities, current |  |  |  | (7,191)
Deferred tax liability |  |  |  | (4,122)
Other long-term liabilities |  |  |  | (785)
Total |  |  |  | 66,996
SEOmoz Acquisition | Trade names |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible assets |  |  |  | 7,200
SEOmoz Acquisition | Customer relationship |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible assets |  |  |  | 5,000
SEOmoz Acquisition | Other intangibles |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Finite-lived intangible assets |  |  |  | $ 21,607

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