Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 366,729	$ 365,886
Accumulated Amortization	(112,765)	(102,592)
Net Carrying Amount	253,964	263,294
Regional Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	36,694	36,259
Accumulated Amortization	(18,523)	(16,688)
Net Carrying Amount	$ 18,171	$ 19,571
Weighted Average Useful Life (Years)	5 years	5 years
Life Stance Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 235,500	$ 235,500
Accumulated Amortization	(30,174)	(27,557)
Net Carrying Amount	$ 205,326	$ 207,943
Weighted Average Useful Life (Years)	22 years 6 months	22 years 6 months
Non-Competition Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 94,535	$ 94,127
Accumulated Amortization	(64,068)	(58,347)
Net Carrying Amount	$ 30,467	$ 35,780
Weighted Average Useful Life (Years)	4 years 2 months 12 days	4 years 2 months 12 days