Related-Party Transactions - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Mar. 31, 2024	Dec. 31, 2023
Related Party Transaction [Line Items]
Revenue	$ 478,710	$ 348,173	$ 1,369,331	$ 1,033,625
Operating lease right-of-use assets	33,119		33,119			$ 37,396
Expenses payable	400	500	2,100	900
Investments in privately held entities	8,896		8,896			6,396
Operating lease liabilities	5,241		5,241			4,607
Third Way Health | Agreement for Future Equity Fund
Related Party Transaction [Line Items]
Investments in privately held entities	6,000		6,000			3,500
Risk pool settlements and incentives
Related Party Transaction [Line Items]
Revenue	21,779	15,022	57,564	48,605
LMA | Related Party
Related Party Transaction [Line Items]
Revenue		4,300		16,200
First Commonwealth Property, LLC
Related Party Transaction [Line Items]
Operating lease right-of-use assets	700		700			800
Operating lease liabilities	800		800			800
Allied Pacific Holdings Investment Management, LLC | Chief Executive Officer
Related Party Transaction [Line Items]
Operating lease right-of-use assets	2,000		2,000			14,100
Operating lease liabilities	2,000		2,000			14,500
AHMC
Related Party Transaction [Line Items]
Amount outstanding under agreement	74,700		74,700			$ 54,000
AHMC | Related Party | Risk pool settlements and incentives
Related Party Transaction [Line Items]
Revenue	9,400	4,200	28,500	33,000
AHMC | Arroyo Vista | Related Party
Related Party Transaction [Line Items]
Revenue	400	500	1,500	1,300
APC | Board [Member]
Related Party Transaction [Line Items]
Payments for repurchase of shares	700		700	9,500
APC | Sunny Village Care Center | Provider Services
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	100	200	300	1,000
APC | Board Members | Provider Services
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	4,600	11,600	14,100	30,500
APC | Board Members Who Are Also Officers | Provider Services
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	800	700	2,200	2,300
APC | Allied Pacific Holdings Investment Management, LLC | Taxes Associated with Excluded Assets Spin-off
Related Party Transaction [Line Items]
Related party transaction, amount of transaction			5,300
AMG | First Commonwealth Property, LLC | Office Lease
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	100	100	100	100
AMG | Allied Pacific Holdings Investment Management, LLC | Office Lease
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	$ 1,300	800	$ 3,000	2,500
I Health, Inc.
Related Party Transaction [Line Items]
Equity interest (as a percent)	25.00%		25.00%		25.00%
I Health, Inc. | Related Party
Related Party Transaction [Line Items]
Incurred expenses	$ 600		$ 1,200
PMIOC
Related Party Transaction [Line Items]
Equity interest (as a percent)	40.00%		40.00%
PMIOC | Provider Services
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	$ 800	800	$ 2,200	1,900
Song PC
Related Party Transaction [Line Items]
Equity interest (as a percent)	25.00%		25.00%
Song PC | Provider Services
Related Party Transaction [Line Items]
Related party transaction, amount of transaction	$ 300	$ 300	$ 700	$ 800