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Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 8 Months Ended | 9 Months Ended | 11 Months Ended
--- | --- | --- | --- | --- | ---
Jan. 31, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2020 | Sep. 30, 2021 | Dec. 31, 2020
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Depreciation and amortization | $ 2,105,000 | $ 35,812,000 | $ 36,756,000 | $ 97,815,000 | $ 106,493,000 |
Gain (loss) on foreign currency exchange rates | 82,000 |  |  | 38,000 | 281,000 |
Goodwill [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Goodwill impairment |  |  |  |  |  | $ 0
Other Comprehensive Income (Loss) |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Gain (loss) on foreign currency exchange rates | 0.0 | (3,100,000) | 7,000,000.0 | (1,200,000) | (1,600,000) |
Operations and Comprehensive Income (Loss) |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Gain (loss) on foreign currency exchange rates | 100,000 | $ 200,000 | $ 500,000 | $ (400,000) | $ (100,000) |
Customer Lists |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life |  | 14 years | 14 years | 14 years | 14 years | 14 years
Depreciation and amortization | $ 800,000 | $ 16,400,000 | $ 17,800,000 | $ 47,400,000 | $ 49,100,000 |
Amortization Period | 13 years 3 months 18 days |  |  |  |  |
Customer Lists | Minimum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life | 7 years |  |  |  |  |
Customer Lists | Maximum |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Useful life | 14 years |  |  |  |  |
Trade Name [Member] |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Impairment of intangible assets |  |  |  |  | $ 0 | $ 0
Useful life |  | 20 years | 20 years | 20 years | 20 years |
Depreciation and amortization | $ 0 | $ 2,000,000.0 | $ 2,000,000.0 | $ 5,400,000 | $ 6,000,000.0 |
Trade Name [Member] | Customer Lists |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |
Impairment of intangible assets |  |  |  |  | $ 0 | $ 0

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