Related-Party Transactions - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Related Party Transaction [Line Items]
Revenue	$ 404,356	$ 337,244
Operating lease right-of-use assets	39,152		$ 37,396
Operating lease liabilities	5,007		4,607
Expenses payable	600	400
Risk pool settlements and incentives
Related Party Transaction [Line Items]
Revenue	17,377	13,462
Song PC | Provider Services
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	200	200
AHMC
Related Party Transaction [Line Items]
Amount outstanding under agreement	58,800		54,000
AHMC | Related Party | Risk pool settlements and incentives
Related Party Transaction [Line Items]
Revenue	8,100	13,000
Allied Pacific Holdings Investment Management, LLC | Chief Executive Officer
Related Party Transaction [Line Items]
Operating lease right-of-use assets	12,700		14,100
Operating lease liabilities	13,200		$ 14,500
AHMC | LMA | Related Party
Related Party Transaction [Line Items]
Revenue		5,000
AHMC | Arroyo Vista | Related Party
Related Party Transaction [Line Items]
Revenue	500	500
APC | Board Member
Related Party Transaction [Line Items]
Payments for repurchase of shares	0	9,500
APC | PMIOC | Provider Services
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	800	600
APC | Sunny Village Care Center | Provider Services
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	45	200
APC | Board Members | Provider Services
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	4,700	9,400
APC | Board Members Who Are Also Officers | Provider Services
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	800	900
NMM | Arroyo Vista | Provider Services
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	100	64
AMG | First Commonwealth Property, LLC | Office Lease
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	38
AMG | Allied Pacific Holdings Investment Management, LLC | Office Lease
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	$ 900	$ 900
PMIOC | APC
Related Party Transaction [Line Items]
Equity interest (as a percent)	40.00%
Song PC | Astrana Medical
Related Party Transaction [Line Items]
Equity interest (as a percent)	25.00%