Intangible Assets, Net - Schedule of Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Indefinite-lived Intangible Assets [Roll Forward]
Impairment of intangible assets	$ 0	$ 0	$ 0
Amortized intangible assets:
Accumulated Amortization	(131,268,000)	(118,611,000)
Total	69,498,000
Intangible Assets, Gross	202,916,000	195,472,000	187,729,000
Additions	7,444,000	7,743,000
Impairment/ Disposal	0	0
Intangible Assets, Net	71,648,000	76,861,000
Network relationships
Amortized intangible assets:
Beginning Balance, Gross	150,679,000	150,679,000
Additions	0	0
Impairment/ Disposal	0	0
Accumulated Amortization	(104,859,000)	(95,451,000)
Ending Balance, Gross	150,679,000	150,679,000	150,679,000
Total	$ 45,820,000	$ 55,228,000
Network relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	11 years	11 years
Network relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	21 years	21 years
Management contracts
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	15 years	15 years
Amortized intangible assets:
Beginning Balance, Gross	$ 22,832,000	$ 22,832,000
Additions	0	0
Impairment/ Disposal	0	0
Accumulated Amortization	(16,662,000)	(15,208,000)
Ending Balance, Gross	22,832,000	22,832,000	22,832,000
Total	6,170,000	$ 7,624,000
Member relationships
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)		12 years
Amortized intangible assets:
Beginning Balance, Gross	16,633,000	$ 8,997,000
Additions	7,444,000	7,636,000
Impairment/ Disposal	0	0
Accumulated Amortization	(7,345,000)	(5,619,000)
Ending Balance, Gross	24,077,000	16,633,000	8,997,000
Total	$ 16,732,000	$ 11,014,000
Member relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	10 years
Member relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	14 years
Patient management platform
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	5 years	5 years
Amortized intangible assets:
Beginning Balance, Gross	$ 2,060,000	$ 2,060,000
Additions	0	0
Impairment/ Disposal	0	0
Accumulated Amortization	(2,060,000)	(2,060,000)
Ending Balance, Gross	2,060,000	2,060,000	2,060,000
Total	$ 0	$ 0
Tradename/trademarks
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	20 years	20 years
Amortized intangible assets:
Beginning Balance, Gross	$ 1,011,000	$ 1,011,000
Additions	0	0
Impairment/ Disposal	0	0
Accumulated Amortization	(308,000)	(257,000)
Ending Balance, Gross	1,011,000	1,011,000	1,011,000
Total	$ 703,000	$ 754,000
Developed technology
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	6 years	6 years
Amortized intangible assets:
Beginning Balance, Gross	$ 107,000	$ 0
Additions	0	107,000
Impairment/ Disposal	0	0
Accumulated Amortization	(34,000)	(16,000)
Ending Balance, Gross	107,000	107,000	0
Total	73,000	91,000
Trademarks
Indefinite-lived Intangible Assets [Roll Forward]
Beginning Balance	2,150,000	2,150,000
Additions	0	0
Impairment of intangible assets	0	0
Ending Balance	$ 2,150,000	$ 2,150,000	$ 2,150,000