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Acquisitions - Summary of Consideration Paid and Amounts Recognized for Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Oct. 31, 2024 | Sep. 30, 2023 | Dec. 31, 2024 | Dec. 31, 2023
Consideration |  |  |  |
Plus: fair value of assumed Sterling equity awards to receive equity awards attributable to pre-combination service |  |  | $ 4,487 |
Cash purchase price |  | $ 41,000 |  |
Other intangible assets |  |  | 987,948 | $ 344,014
Sterling Check Corp [Member] |  |  |  |
Consideration |  |  |  |
Total fair value of consideration transferred | $ 2,200,000 |  |  |
Sterling Check Corp [Member] | Merger Agreement [Member] |  |  |  |
Consideration |  |  |  |
Cash consideration |  |  | 1,152,163 |
Plus: fair value of assumed Sterling equity awards to receive cash attributable to pre-combination service |  |  | 15,905 |
Plus: repayment of Sterling's outstanding debt |  |  | 535,046 |
Plus: fair value of First Advantage common stock issued |  |  | 490,098 |
Plus: fair value of assumed Sterling equity awards to receive equity awards attributable to pre-combination service |  |  | 4,487 |
Total fair value of consideration transferred |  |  | 2,197,699 |
Current assets |  |  | 227,469 |
Property and equipment, including software developed for internal use |  |  | 273,370 |
Intangible assets |  |  | 717,000 |
Other assets |  |  | 12,516 |
Deferred tax liability |  |  | (238,077) |
Other liabilities |  |  | (16,226) |
Current liabilities |  |  | (149,818) |
Total identifiable net assets |  |  | 884,334 |
Goodwill |  |  | 1,313,365 |
Infinite ID |  |  |  |
Consideration |  |  |  |
Cash purchase price |  |  | 41,000 |
Other transaction adjustments |  |  | 97 |
Total fair value of consideration transferred |  |  | 41,097 |
Current assets |  |  | 1,335 |
Property and equipment, including software developed for internal use |  |  | 5,959 |
Trade name |  |  | 2,300 |
Other assets |  |  | 236 |
Current liabilities |  |  | 3,800 |
Other intangible assets |  |  | 2,400 |
Current liabilities |  |  | (1,084) |
Total identifiable net assets |  |  | 14,946 |
Goodwill |  |  | $ 26,151 |

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