Intangible Assets, Net - Schedule of Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Indefinite-lived Intangible Assets [Roll Forward]
Impairment of intangible assets	$ 0	$ 0
Amortized intangible assets:
Accumulated Amortization	(104,922,000)	(89,544,000)
Total	80,657,000
Intangible Assets, Gross	187,729,000	176,529,000	$ 176,529,000
Intangible Assets, Net	82,807,000	86,985,000
Additions	11,200,000	0
Impairment/ Disposal	0	0
Network relationships
Amortized intangible assets:
Beginning Balance, Gross	143,930,000	143,930,000
Additions	6,749,000	0
Impairment/ Disposal	0	0
Ending Balance, Gross	150,679,000	143,930,000
Accumulated Amortization	(84,865,000)	(73,169,000)
Total	$ 65,814,000	$ 70,761,000
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)	15 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
Ending Balance, Gross	22,832,000	22,832,000
Accumulated Amortization	(13,563,000)	(11,715,000)
Total	$ 9,269,000	$ 11,117,000
Member relationships
Finite-Lived Intangible Assets [Line Items]
Useful Life (Years)	12 years	12 years
Amortized intangible assets:
Beginning Balance, Gross	$ 6,696,000	$ 6,696,000
Additions	2,301,000	0
Impairment/ Disposal	0	0
Ending Balance, Gross	8,997,000	6,696,000
Accumulated Amortization	(4,606,000)	(3,234,000)
Total	$ 4,391,000	$ 3,462,000
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
Ending Balance, Gross	2,060,000	2,060,000
Accumulated Amortization	(1,682,000)	(1,270,000)
Total	$ 378,000	$ 790,000
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
Ending Balance, Gross	1,011,000	1,011,000
Accumulated Amortization	(206,000)	(156,000)
Total	805,000	855,000
Trademarks
Indefinite-lived Intangible Assets [Roll Forward]
Beginning Balance	0
Additions	2,150,000
Impairment of intangible assets	0
Ending Balance	$ 2,150,000	$ 0