Description of Business - Additional Information (Details)							12 Months Ended
	Apr. 30, 2020 USD ($)	Sep. 11, 2019 USD ($) shares	Sep. 10, 2019 USD ($)	Aug. 30, 2019 USD ($)	May 31, 2019 USD ($)	Jul. 01, 1999	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2020 enrollee	Dec. 31, 2020 primary_care_physician	Dec. 31, 2020 specialty_care_physician	Dec. 31, 2020 plan	Dec. 31, 2020 clinic	Dec. 31, 2020 company	Dec. 31, 2020 medical_center	Dec. 31, 2020 member	Sep. 30, 2019 USD ($)
Description Of Business [Line Items]
Distributions of preferred returns								$ 1,990,000	$ 1,975,000
Stock issued during period new issues								0
Cash paid							$ 11,354,000	49,403,000	0
Proceeds from sale of equity method investment							52,743,000	$ 0	$ 0
Accountable Health Care IPA
Description Of Business [Line Items]
Consideration transferred				$ 25,100,000
AMG
Description Of Business [Line Items]
Consideration transferred			$ 1,600,000
Universal Care, Inc.
Description Of Business [Line Items]
Proceeds from sale of equity method investment	$ 52,743,000
Beneficial interest in UCI	$ 15,723,000
Dr. Jay | Accountable Health Care IPA
Description Of Business [Line Items]
Interest acquired				75.00%
Consideration transferred				$ 7,300,000
Affiliated Entity | AP-AMH
Description Of Business [Line Items]
Amount of loan		$ 545,000,000.0																$ 545,000,000.0
Term of receivable		10 years
Stated rate of note of loan receivable		10.00%
Interest rate in the event of default		10.75%
Affiliated Entity | APC
Description Of Business [Line Items]
Number of shares purchased by related party (in shares) | shares		15,015,015
Stock issued during period new issues		$ 300,000,000.0
Proxy votes		9.99%
APC
Description Of Business [Line Items]
Initial fixed term of amended and restated management and administrative services agreement						30 years
APC | MPP, AMG Properties, and ZLL Asset Acquisition
Description Of Business [Line Items]
Asset acquisition, purchase price							$ 12,200,000
Asset acquisition, percentage of shares acquired							100.00%
Asset acquisition, number of companies acquired | company															3
APC | Accountable Health Care IPA
Description Of Business [Line Items]
Interest acquired				25.00%
APC | AMG
Description Of Business [Line Items]
Interest acquired			100.00%
Payments to acquire business			$ 1,200,000
Value of shares transferred in acquisition			$ 400,000
APC | Universal Care Acquisition Partners, LLC
Description Of Business [Line Items]
Ownership interest							100.00%
APC | MPP, AMG Properties, and ZLL Asset Acquisition
Description Of Business [Line Items]
Ownership interest							100.00%
APC | ApolloMed
Description Of Business [Line Items]
Investment, ownership interest							22.58%	32.50%
APC | Concourse Diagnostic Surgery Center, LLC
Description Of Business [Line Items]
Investment, ownership interest							45.01%
APC | Universal Care, Inc.
Description Of Business [Line Items]
Ownership interest disposed	48.90%
Proceeds from sale of equity method investment	$ 69,200,000
Repayment of indebtedness received	16,500,000
Beneficial interest in UCI	15,700,000
APC | Bright | Preferred stock | Universal Care, Inc.
Description Of Business [Line Items]
Preferred shares received from sale of equity method investment	$ 36,200,000
APC | Affiliated Entity
Description Of Business [Line Items]
Distributions of preferred returns							$ 5,000,000.0
APC | Affiliated Entity | AP-AMH
Description Of Business [Line Items]
Distributions of preferred returns							$ 30,400,000	$ 8,900,000
APC | Affiliated Entity | AP-AMH | Series A Preferred Stock
Description Of Business [Line Items]
Number of shares purchased by related party (in shares) | shares		1,000,000
APC LSMA | Alpha Care
Description Of Business [Line Items]
Cash paid					$ 45,100,000
APC LSMA | Accountable Health Care IPA
Description Of Business [Line Items]
Interest acquired				75.00%
APC LSMA | AMG
Description Of Business [Line Items]
Interest acquired			100.00%
Payments to acquire business			$ 1,200,000
APC LSMA | Maverick Medical Group, Inc
Description Of Business [Line Items]
Ownership interest							100.00%
APC LSMA | Dr. Jay | Accountable Health Care IPA
Description Of Business [Line Items]
Consideration transferred				$ 7,300,000
Accountable Health Care IPA
Description Of Business [Line Items]
Number of employees (more than)											336	559
Number of medical centers | medical_center																1
Number of members of federally qualified health plans (more than) | member																	73,000
Number federally qualified health plans | plan													3
AMG
Description Of Business [Line Items]
Number of family practice clinics | clinic														3
Alpha Care
Description Of Business [Line Items]
Number of healthcare enrollees | enrollee										180,000