Subsequent Events (Details) $ / shares in Units, $ in Millions			1 Months Ended	12 Months Ended
	Feb. 28, 2024 USD ($) $ / shares	Jan. 02, 2024 USD ($) clinic	Feb. 05, 2024 USD ($) shares	Dec. 31, 2023 $ / shares shares	Dec. 31, 2022 $ / shares shares	Sep. 24, 2021 $ / shares	Sep. 10, 2021 $ / shares
Subsequent Event [Line Items]
Common stock repurchased (in shares) | shares				5,289,607	939,417
Common stock, par value (in USD per share) | $ / shares				$ 0.01	$ 0.01	$ 0.01	$ 0.01
Subsequent Event
Subsequent Event [Line Items]
Common stock repurchased (in shares) | shares			494,157
Value of common stock repurchased			$ 6.8
Common stock, par value (in USD per share) | $ / shares	$ 0.01
Recapitalization exchange ratio	0.979
Price per share (in USD per share) | $ / shares	$ 16.73
Cash consideration receivable, percentage of common stock issued and outstanding	72.00%
Stock consideration receivable, percentage of common stock issued and outstanding	28.00%
Required lapse in business days from mailing of information statement	20 days
Possible extension period for consummation of the Merger	6 months
Possible termination fee	$ 66.3
Percentage of outstanding shares held by Specified Stockholders	53.50%
Subsequent Event | First Advantage
Subsequent Event [Line Items]
Common stock, par value (in USD per share) | $ / shares	$ 0.001
Required business days to consummate Merger after satisfaction of conditions	5 days
Subsequent Event | First Advantage | Maximum
Subsequent Event [Line Items]
Possible termination fee	$ 100.0
Subsequent Event | First Advantage | Initial Outside Date
Subsequent Event [Line Items]
Possible termination fee	60.0
Subsequent Event | First Advantage | Extended Outside Date
Subsequent Event [Line Items]
Possible termination fee	$ 90.0
Subsequent Event | Vault
Subsequent Event [Line Items]
Aggregate purchase price		$ 70.0
Subsequent Event | Vault | Revolving Credit Facility
Subsequent Event [Line Items]
Proceeds from lines of credit		$ 65.0
Subsequent Event | Vault | Clinics
Subsequent Event [Line Items]
Number of businesses acquired | clinic		17,000