Description of Business (Details) member in Thousands, enrollee in Thousands					9 Months Ended		12 Months Ended
	Sep. 11, 2019 USD ($) shares	Sep. 10, 2019 USD ($) clinic	Nov. 15, 2016 USD ($)	Jul. 01, 1999	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Dec. 31, 2011 USD ($)	Sep. 30, 2019 medical_center	Sep. 30, 2019 plan	Sep. 30, 2019 specialty_care_physician	Sep. 30, 2019 primary_care_physician	Sep. 30, 2019 enrollee	Sep. 30, 2019 member	Aug. 30, 2019	Dec. 31, 2018	Sep. 21, 2018	Jul. 31, 2016	Jun. 04, 2014
Description Of Business [Line Items]
Fixed term of amended and restated management and administrative services agreement				30 years
Amount invested to acquire ownership interest					$ 2,949,000	$ 16,673,840
Accountable Health Care - related party
Description Of Business [Line Items]
Ownership interest					100.00%											25.00%
Number of employees (more than)										700	400
Number of medical centers | medical_center								5
Number of members of federally qualified health plans (more than) | member													89
Number federally qualified health plans | plan									3
Interest acquired														75.00%
ApolloMed
Description Of Business [Line Items]
Ownership interest					32.54%										4.82%
Concourse Diagnostic Surgery Center, LLC
Description Of Business [Line Items]
Ownership interest							41.59%										43.43%
Amount invested to acquire ownership interest							$ 600,000
Maverick Medicare Group, Inc.
Description Of Business [Line Items]
Ownership interest					100.00%
Alpha Care Medical Group, Inc.
Description Of Business [Line Items]
Number of healthcare enrollees | enrollee												170
Universal Care Acquisition Partners, LLC
Description Of Business [Line Items]
Ownership interest																		100.00%
International Cancer Center ICC
Description Of Business [Line Items]
Ownership interest			40.00%
Payments to acquire business			$ 400,000
AP-AMH Medical Corporation | Affiliated Entity
Description Of Business [Line Items]
Amount of loan	$ 545,000,000
Term of receivable	10 years
Stated rate of note of loan receivable	10.00%
Interest rate in the event of default	10.75%
AP-AMH Medical Corporation | Affiliated Entity | Series A Preferred Stock
Description Of Business [Line Items]
Number of shares purchased by related party | shares	1,000,000
Stock subscription	$ 545,000,000
APC | Affiliated Entity
Description Of Business [Line Items]
Number of shares purchased by related party | shares	15,015,015
Stock subscription	$ 300,000,000
Proxy votes	9.99%
AMG, Inc
Description Of Business [Line Items]
Number of family practice clinics | clinic		3
AMG, Inc | APC
Description Of Business [Line Items]
Interest acquired		100.00%
Payments to acquire business		$ 1,200,000
Value of shares transferred in acquisition		$ 400,000