Credit Facility, Bank Loans, and Lines of Credit - Additional Information (Details)				1 Months Ended	6 Months Ended	9 Months Ended
	Apr. 01, 2024 USD ($)	Nov. 03, 2023 USD ($)	Jun. 16, 2021 USD ($)	May 31, 2021	Jun. 30, 2024 USD ($)	Sep. 30, 2024 USD ($) FinancialRatio	Sep. 30, 2023	Jul. 01, 2024 USD ($)	Mar. 31, 2024	Dec. 31, 2023 USD ($)	Sep. 08, 2023 USD ($)	May 01, 2023 USD ($)	Sep. 10, 2019 USD ($)
Debt Instrument [Line Items]
Amount outstsnding						$ 441,857,000				$ 282,000,000
Average effective interest rate						7.08%	6.07%
Loan from company						$ 441,857,000
Deferred financing costs						4,800,000				6,100,000
Unamortized deferred financing costs						3,738,000				3,561,000
FYB
Debt Instrument [Line Items]
Interest acquired												100.00%
Minimum | Secured Overnight Financing Rate
Debt Instrument [Line Items]
Basis spread on variable rate					1.50%
Minimum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate					0.50%
Maximum | Secured Overnight Financing Rate
Debt Instrument [Line Items]
Basis spread on variable rate					2.75%
Maximum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate					1.75%
Revolver Loan
Debt Instrument [Line Items]
Amount outstsnding						$ 146,700,000
Repayments					$ 180,000,000
Proceeds from (repayments of) bank overdrafts		$ 120,000,000
I Health, Inc.
Debt Instrument [Line Items]
% of Ownership						25.00%			25.00%
Amended Credit Agreement | Minimum | Secured Overnight Financing Rate
Debt Instrument [Line Items]
Basis spread on variable rate			1.25%
Amended Credit Agreement | Minimum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate			0.25%
Amended Credit Agreement | Maximum | Secured Overnight Financing Rate
Debt Instrument [Line Items]
Basis spread on variable rate			2.50%
Amended Credit Agreement | Maximum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate			1.50%
Amended Credit Agreement | Revolver Loan
Debt Instrument [Line Items]
Revolving credit facility term			5 years
Maximum loan availability			$ 400,000,000
Interest rate						7.20%
Credit Agreement Amendment | Secured Debt | Truist Bank | Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Interest rate (as a percent)		5.00%
Credit Agreement Amendment | Secured Debt | Truist Bank | Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Interest rate (as a percent)		7.50%
Credit Agreement Amendment | Secured Debt | Truist Bank | Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Interest rate (as a percent)		10.00%
Credit Agreement
Debt Instrument [Line Items]
Amount outstsnding						$ 285,300,000
Average effective interest rate						7.20%
Number of key financial ratios | FinancialRatio						2
Maximum consolidated leverage ratio (not greater than)						3.75
Debt covenant, aggregate purchase price, maximum						$ 75,000,000
Consolidated leverage ratio, annual decrease						0.25
Debt instrument, covenant, leverage ratio, adjusted maximum						4.00
Minimum consolidated interest coverage ratio (not less than)						3.25
Subordinated Loan Agreement | Subordinated Debt
Debt Instrument [Line Items]
Basis spread on variable rate				1.00%
Debt, principal sum												$ 2,000,000
I Health Promissiory Note
Debt Instrument [Line Items]
Proceeds from promissory note	$ 8,300,000
Interest rate (as a percent)	4.30%
Additional Principal Amount								$ 1,600,000
Notes payable								$ 9,900,000
FYB Promissory Note
Debt Instrument [Line Items]
Amount outstsnding						$ 2,000,000
Letter of Credit | Astrana Medical
Debt Instrument [Line Items]
Loan from company						545,000,000
Letter of Credit | Amended Credit Agreement
Debt Instrument [Line Items]
Maximum loan availability			$ 25,000,000								$ 50,000,000
Letter of Credit | Credit Agreement Amendment | Truist Bank
Debt Instrument [Line Items]
Amount funded at closing		$ 300,000,000
New Term Loan
Debt Instrument [Line Items]
Unamortized deferred financing costs						1,000,000				$ 2,600,000
Line of Credit | APC Business Loan Agreement | Preferred Bank | Allied Pacific Of California IPA
Debt Instrument [Line Items]
Maximum loan availability													$ 4,100,000
Standby Letters of Credit | Allied Pacific Of California IPA
Debt Instrument [Line Items]
Maximum loan availability						$ 3,900,000
Term of facility						1 year
Standby Letters of Credit | Amended Credit Agreement | Truist Bank
Debt Instrument [Line Items]
Maximum loan availability						$ 25,000,000
Term of facility						1 year