Redeemable Non-Controlling Interests - Schedule of Redeemable Non-Controlling Interests (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance, beginning	$ 34,043	$ 39,033	$ 398,171
Net income attributable to redeemable non-controlling interests	8,087	7,572	50,153
Distributions to and purchases of redeemable non-controlling interests	(8,217)	(5,443)	(911)
Redemption value adjustment on redeemable non-controlling interests	(1,527)	(3,385)	250,083
Purchase of membership interests of Concentra Group Holdings Parent	(6,268)	(5,876)	(660,658)
Other	179	2,142	2,195
Balance, ending	$ 26,297	$ 34,043	$ 39,033