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Acquisitions - Additional Information (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 01, 2022 | Sep. 30, 2023 | Nov. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |
Goodwill |  |  |  |  | $ 820,654 | $ 793,080 | $ 793,892
Revenues |  |  |  |  | 763,761 | $ 810,023 | $ 712,295
Form I-9 Compliance |  |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |
Cash, net of cash acquired | $ 19,800 |  |  |  |  |  |
Goodwill | 9,100 |  |  |  |  |  |
Intangible assets Acquired | 8,500 |  |  |  |  |  |
Customer Related Intangible Assets Current | $ 6,100 |  |  |  |  |  |
Useful life | 13 years |  |  |  |  |  |
Form I-9 Compliance | Developed Technology Rights [Member] |  |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |
Intangible assets Acquired | $ 2,400 |  |  |  |  |  |
Useful life | 5 years |  |  |  |  |  |
March 2021 UK Acquisition |  |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |
Cash, net of cash acquired |  |  |  | $ 7,600 |  |  |
Goodwill |  |  |  | 3,100 |  |  |
Intangible assets Acquired |  |  |  | $ 3,000 |  |  |
Corporate Screening [Member] |  |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |
Cash, net of cash acquired |  |  | $ 39,400 |  |  |  |
Business acquisition, Percentage acquired |  |  | 100.00% |  |  |  |
Goodwill |  |  | $ 22,200 |  |  |  |
Intangible assets Acquired |  |  | $ 15,500 |  |  |  |
Useful life |  |  | 13 years |  |  |  |
Current assets |  |  | $ 2,900 |  |  |  |
Current liabilities |  |  | (1,600) |  |  |  |
Corporate Screening [Member] | Developed Technology Rights [Member] |  |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |
Intangible assets Acquired |  |  | $ 3,600 |  |  |  |
Useful life |  |  | 5 years |  |  |  |
Corporate Screening [Member] | Customer [Member] |  |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |
Customer Related Intangible Assets Current |  |  | $ 11,800 |  |  |  |
Infinite ID |  |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |  |
Fair value of consideration transferred |  |  |  |  | 41,122 |  |
Cash, net of cash acquired |  | $ 41,000 |  |  | $ 41,000 |  |
Business acquisition, Percentage acquired |  |  |  |  | 100.00% |  |
Current assets |  |  |  |  | $ 1,335 |  |
Current liabilities |  |  |  |  | $ (1,427) |  |

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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479328/805-10-50-2 + Details
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- Definition This element represents the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property. Such amount may include the value assigned to existing tenant relationships and excludes the market adjustment component of the value assigned for above or below-market leases acquired. + References No definition available. + Details
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. 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