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Acquisitions and Dispositions - Assets Acquired and Liabilities Assumed (Details) $ in Thousands, £ in Millions | Jun. 30, 2023 USD ($) | Apr. 25, 2023 USD ($) | Dec. 31, 2022 USD ($) | Oct. 03, 2022 USD ($) | Oct. 03, 2022 GBP (£) | May 31, 2022 USD ($) | Apr. 19, 2022 USD ($)
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Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill | $ 1,578,832 |  | $ 1,566,956 |  |  |  |
BNG |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  |  | $ 2,766
Accounts receivable |  |  |  |  |  |  | 10,147
Other current assets |  |  |  |  |  |  | 671
Fixed assets |  |  |  |  |  |  | 1,587
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  |  |  | (12,740)
Other assets |  |  |  |  |  |  | 1,583
Accounts payable |  |  |  |  |  |  | (4,771)
Accruals and other liabilities |  |  |  |  |  |  | (6,880)
Advance billings |  |  |  |  |  |  | (1,159)
Other liabilities |  |  |  |  |  |  | (3,642)
Net liabilities assumed |  |  |  |  |  |  | 13,042
Goodwill |  |  |  |  |  |  | 24,643
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed Less Deferred Acquisition Consideration, Net |  |  |  |  |  |  | $ 37,685
TMA Direct |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Accounts receivable |  |  |  |  |  | $ 582 |
Other current assets |  |  |  |  |  | 669 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  |  | (13,200) |
Accounts payable |  |  |  |  |  | (379) |
Accruals and other liabilities |  |  |  |  |  | (270) |
Noncontrolling interests |  |  |  |  |  | (2,667) |
Net liabilities assumed |  |  |  |  |  | 11,135 |
Goodwill |  |  |  |  |  | 6,569 |
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed Less Deferred Acquisition Consideration, Net |  |  |  |  |  | $ 17,704 |
Maru Group |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  | $ 1,033 |  |  |
Accounts receivable |  |  |  | 7,374 |  |  |
Other current assets |  |  |  | 899 |  |  |
Fixed assets |  |  |  | 157 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  | (14,300) |  |  |
Other assets |  |  |  | 1,920 |  |  |
Accounts payable |  |  |  | (4,087) |  |  |
Accruals and other liabilities |  |  |  | (9,154) |  |  |
Advance billings |  |  |  | (6,462) |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities |  |  |  | (3,328) |  |  |
Other liabilities |  |  |  | (3,591) |  |  |
Net liabilities assumed |  |  |  | (939) |  |  |
Goodwill |  |  |  | 26,733 |  |  |
Purchase price consideration |  |  |  | 25,794 | £ 23.0 |  |
Wolfgang |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  | 1,606 |  |  |
Accounts receivable |  |  |  | 1,180 |  |  |
Other current assets |  |  |  | 100 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  | (1,055) |  |  |
Other assets |  |  |  | 46 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities |  |  |  | (278) |  |  |
Net liabilities assumed |  |  |  | 3,709 |  |  |
Goodwill |  |  |  | 2,451 |  |  |
Purchase price consideration |  |  |  | 6,160 |  |  |
Epicenter |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Cash and cash equivalents |  |  |  | 901 |  |  |
Other current assets |  |  |  | 45 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  | (7,300) |  |  |
Accounts payable |  |  |  | (148) |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other |  |  |  | (650) |  |  |
Net liabilities assumed |  |  |  | 7,448 |  |  |
Goodwill |  |  |  | 4,416 |  |  |
Purchase price consideration |  |  |  | $ 11,864 |  |  |
Huskies [Member] |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill |  | $ 2,600 |  |  |  |  |

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