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Acquisitions - Additional Information (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Nov. 30, 2021 | Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Restructuring Cost And Reserve [Line Items] |  |  |  |
Goodwill |  | $ 802,675 |  | $ 793,892
March 2021 UK Acquisition [Member] |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Goodwill |  |  | $ 3,100 |
Intangible assets |  |  | 3,000 |
Cash, net of cash acquired |  |  | $ 7,600 |
Form I-9 Compliance [Member] |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Cash consideration |  | 19,087 |  |
Current assets |  | 1,151 |  |
Liabilities assumed |  | 325 |  |
Cash, net of cash acquired |  | $ 19,800 |  |
Corporate Screening Services, LLC [Member] |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Goodwill | $ 22,200 |  |  |
Intangible assets | 15,500 |  |  |
Customer list | $ 11,800 |  |  |
Intangible asset, estimated useful life | 14 years |  |  |
Current assets | $ 2,900 |  |  |
Liabilities assumed | $ 1,600 |  |  |
Business acquisition, Percentage acquired | 100.00% |  |  |
Cash, net of cash acquired | $ 39,400 |  |  |
Developed Technology [Member] | Corporate Screening Services, LLC [Member] |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |
Intangible assets | $ 3,600 |  |  |
Intangible asset, estimated useful life | 5 years |  |  |

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