Intangible Assets, Net - Schedule of Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Indefinite-lived Intangible Assets [Roll Forward]
Impairment of intangible assets	$ 0	$ 0	$ 0
Amortized intangible assets:
Accumulated Amortization	(118,611,000)	(104,922,000)
Total	74,711,000
Intangible Assets, Gross	195,472,000	187,729,000	176,529,000
Additions	7,743,000	11,200,000
Impairment/ Disposal	0	0
Intangible Assets, Net	76,861,000	82,807,000
Network relationships
Amortized intangible assets:
Beginning Balance, Gross	150,679,000	143,930,000
Additions	0	6,749,000
Impairment/ Disposal	0	0
Accumulated Amortization	(95,451,000)	(84,865,000)
Ending Balance, Gross	150,679,000	150,679,000	143,930,000
Total	$ 55,228,000	$ 65,814,000
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	15 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	(15,208,000)	(13,563,000)
Ending Balance, Gross	22,832,000	22,832,000	22,832,000
Total	$ 7,624,000	$ 9,269,000
Member relationships
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	12 years	12 years
Amortized intangible assets:
Beginning Balance, Gross	$ 8,997,000	$ 6,696,000
Additions	7,636,000	2,301,000
Impairment/ Disposal	0	0
Accumulated Amortization	(5,619,000)	(4,606,000)
Ending Balance, Gross	16,633,000	8,997,000	6,696,000
Total	$ 11,014,000	$ 4,391,000
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)	(1,682,000)
Ending Balance, Gross	2,060,000	2,060,000	2,060,000
Total	$ 0	$ 378,000
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	(257,000)	(206,000)
Ending Balance, Gross	1,011,000	1,011,000	$ 1,011,000
Total	$ 754,000	805,000
Developed technology
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	6 years
Amortized intangible assets:
Beginning Balance, Gross	$ 0
Additions	107,000
Impairment/ Disposal	0
Accumulated Amortization	(16,000)
Ending Balance, Gross	107,000	0
Total	91,000
Trademarks
Indefinite-lived Intangible Assets [Roll Forward]
Beginning Balance	2,150,000
Additions	0	2,150,000
Impairment of intangible assets	0
Ending Balance	$ 2,150,000	$ 2,150,000