Intangible Assets, Net - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (97,002)	$ (89,544)
Total	80,227
Intangible Assets, Gross	177,229	176,529
Intangible Assets, Net	80,227	86,985
Network relationships
Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets, Gross	143,930	143,930
Accumulated Amortization	(79,057)	(73,169)
Total	$ 64,873	$ 70,761
Network relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Life	11 years	11 years
Network relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Life	15 years	15 years
Management contracts
Finite-Lived Intangible Assets [Line Items]
Useful Life	15 years	15 years
Amortized intangible assets, Gross	$ 22,832	$ 22,832
Accumulated Amortization	(12,693)	(11,715)
Total	$ 10,139	$ 11,117
Member relationships
Finite-Lived Intangible Assets [Line Items]
Useful Life	12 years	12 years
Amortized intangible assets, Gross	$ 7,396	$ 6,696
Accumulated Amortization	(3,595)	(3,234)
Total	$ 3,801	$ 3,462
Patient management platform
Finite-Lived Intangible Assets [Line Items]
Useful Life	5 years	5 years
Amortized intangible assets, Gross	$ 2,060	$ 2,060
Accumulated Amortization	(1,476)	(1,270)
Total	$ 584	$ 790
Trade names/trademarks
Finite-Lived Intangible Assets [Line Items]
Useful Life	20 years	20 years
Amortized intangible assets, Gross	$ 1,011	$ 1,011
Accumulated Amortization	(181)	(156)
Total	$ 830	$ 855