Loans Receivable and Loans Receivable - Related Parties - Additional Information (Details) - USD ($)	1 Months Ended	10 Months Ended	12 Months Ended
	Oct. 31, 2020	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 18, 2020	Oct. 30, 2020	Feb. 28, 2020	Jun. 28, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investments in other entities – equity method		$ 43,292,000	$ 43,292,000	$ 28,427,000
Proceeds from repayment of loans receivable - related parties			16,500,000	0	$ 0
Loss recorded, loan receivable			0
Loss recorded, loan receivable - related parties			0
LaSalle Medical Associates – IPA Line of Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investments in other entities – equity method		13,047,000	13,047,000	$ 6,396,000
APC | LaSalle Medical Associates – IPA Line of Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investments in other entities – equity method		$ 6,400,000	$ 6,400,000
Notes Receivable | Dr. Arteaga | LaSalle Medical Associates – IPA Line of Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ownership upon conversion of finance receivable									53.75%
Notes Receivable | Dr. Arteaga | APC and APC-LSMA | LaSalle Medical Associates – IPA Line of Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ownership upon conversion of finance receivable						46.25%
Notes Receivable | Dr. Arteaga | APC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loan									$ 6,400,000
Interest rate on loan receivable		4.25%	4.25%
Percentage of outstanding stock, upon conversion of finance receivable									21.25%
Notes Receivable | Dr. Arteaga | APC | LaSalle Medical Associates – IPA Line of Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loan						$ 6,400,000
Increase in ownership percentage, finance receivable converted		21.25%	21.25%			21.25%
Notes Receivable | Pacific6 | NMM
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loan							$ 500,000
Interest rate on loan receivable							5.00%
Notes Receivable | AHMC | APC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Note receivable, amount	$ 4,000,000.0	$ 4,000,000.0	$ 4,000,000.0
Note receivable, maturity period	2 years
Note receivable, interest rate	3.75%
Notes Receivable | Prime Rate | Dr. Arteaga | APC
Accounts, Notes, Loans and Financing Receivable [Line Items]
Basis spread on variable rate			1.00%
Financing Receivable | Dr. Arteaga
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loan								$ 2,200,000
Proceeds from repayment of loans receivable - related parties		$ 2,200,000