Goodwill and Identifiable Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Identifiable intangible assets
Amortization of intangible assets	$ 10,000	$ 10,100	$ 30,000	$ 34,400
Future amortization expense related to identifiable intangible assets
2023	37,043		37,043
2024	22,276		22,276
2025	21,828		21,828
2026	19,618		19,618
2027	18,190		18,190
Thereafter	53,817		53,817
Total	172,772		172,772		$ 202,231
Impairment of Intangible Assets, Finite-lived	0	$ 0	0	$ 0
Tradenames
Identifiable intangible assets
Finite-Lived Intangible Assets, Accumulated Amortization	22,294		$ 22,294		$ 12,705
Finite-Lived Intangible Assets, Remaining Amortization Period			7 years 8 months 12 days		8 years 4 months 24 days
Future amortization expense related to identifiable intangible assets
Total	90,506		$ 90,506		$ 99,595
Payor contracts
Identifiable intangible assets
Finite-Lived Intangible Assets, Accumulated Amortization	17,966		$ 17,966		$ 11,816
Finite-Lived Intangible Assets, Remaining Amortization Period			7 years 9 months 18 days		8 years 7 months 6 days
Future amortization expense related to identifiable intangible assets
Total	64,034		$ 64,034		$ 70,184
Contractual rental agreements
Identifiable intangible assets
Finite-Lived Intangible Assets, Accumulated Amortization	39,433		$ 39,433		$ 26,158
Finite-Lived Intangible Assets, Remaining Amortization Period			1 year		1 year 9 months 18 days
Future amortization expense related to identifiable intangible assets
Total	14,767		$ 14,767		$ 28,042
Developed technology
Identifiable intangible assets
Finite-Lived Intangible Assets, Accumulated Amortization	2,835		$ 2,835		$ 1,890
Finite-Lived Intangible Assets, Remaining Amortization Period			2 years 9 months 18 days		3 years 6 months
Future amortization expense related to identifiable intangible assets
Total	$ 3,465		$ 3,465		$ 4,410