Related Party Transactions (Details)	3 Months Ended								12 Months Ended
	Dec. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Mar. 31, 2020 USD ($) installment
Related Party Transaction [Line Items]
Revenue from services	$ 414,035,000	$ 442,291,000	$ 540,695,000	$ 622,707,000	$ 628,218,000	$ 636,098,000	$ 753,561,000	$ 788,732,000	$ 2,019,728,000	$ 2,806,609,000	$ 1,676,652,000
Accounts payable and accrued expenses	85,333,000				185,507,000				85,333,000	185,507,000
Payments of notes payable									0	2,426,000	2,426,000
Related Party | Services Provided Entities Affiliated with Board Members
Related Party Transaction [Line Items]
Revenue from services									1,200,000	1,800,000	$ 700,000
Related Party | Rental of WSG's Headquarters
Related Party Transaction [Line Items]
Accounts payable and accrued expenses	$ 0				$ 0				$ 0	$ 0
Affiliated Entity | Acquisition with Mediscan | Earnout Notes Payable
Related Party Transaction [Line Items]
Notes payable												$ 7,300,000
Note payable, number of payment installments | installment												3
Payments of notes payable								$ 2,600,000