Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) segment unit	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Apr. 30, 2020
Summary Of Significant Accounting Policies [Line Items]
Number of operating segments | segment				1
Number of reportable segments | segment				1
Amount deposit accounts exceeded FDIC insured limit		$ 247,300,000		$ 247,300,000		$ 285,900,000
Marketable securities – certificates of deposit		25,128,000		$ 25,128,000		25,024,000
Payments to acquire common stock and warrants	$ 3,000,000
Contingent equity securities, percentage				0.00%
Equity securities		8,153,000		$ 8,153,000		28,393,000
Unrealized gains (losses) recognized on equity securities held at end of period		(6,251,000)	$ 62,000,000	$ (18,866,000)	$ 21,781,000
Risk pool surplus or deficits, settlement period after risk pool performance year				18 months
Impairment of finite-lived intangible assets				$ 0	0
Impairment of long-lived assets				$ 0	0
Number of main reporting units | unit				3
Impairment of goodwill				$ 0	0
Impairment of indefinite-lived intangible assets				0	0
Fiduciary accounts payable		6,506,000		6,506,000		10,534,000
Equity securities, unrealized loss			(1,700,000)		(2,800,000)
Revenue		317,001,000	227,117,000	849,955,000	578,815,000
Contract liabilities		544,000		544,000		16,798,000
Accounts Payable and Accrued Expenses
Summary Of Significant Accounting Policies [Line Items]
Accrued contract liability recognized				16,800,000
Interest rate swap
Summary Of Significant Accounting Policies [Line Items]
Derivative assets		3,231,000		3,231,000
Contingent Equity Securities
Summary Of Significant Accounting Policies [Line Items]
Derivative assets		1,500,000		1,500,000		4,270,000
Contingent equity securities		1,500,000		1,500,000		4,300,000
Cash flow hedges: | Interest rate swap | Other Noncurrent Assets | Derivatives designated as hedging instruments:
Summary Of Significant Accounting Policies [Line Items]
Derivative asset, fair value		3,200,000		3,200,000
Cash flow hedges: | Interest rate swap | Other long-term liabilities | Derivatives designated as hedging instruments:
Summary Of Significant Accounting Policies [Line Items]
Derivative liability, fair value						1,100,000
Certificates of Deposit
Summary Of Significant Accounting Policies [Line Items]
Marketable securities – certificates of deposit		25,100,000		$ 25,100,000		$ 25,000,000
Universal Care Acquisition Partners, LLC | Universal Care Inc
Summary Of Significant Accounting Policies [Line Items]
Ownership interest disposed							48.90%
PMPM Managed Care Contract
Summary Of Significant Accounting Policies [Line Items]
Contract term				one year
Management Fee Income Contract
Summary Of Significant Accounting Policies [Line Items]
Revenue		10,030,000	$ 9,652,000	$ 30,487,000	$ 26,345,000
Risk Pool Settlements and Incentives
Summary Of Significant Accounting Policies [Line Items]
Revenue		$ 48,800,000		$ 48,800,000
Clinigence Holdings, Inc.
Summary Of Significant Accounting Policies [Line Items]
Payments to acquire common stock and warrants	$ 3,000,000
CMS
Summary Of Significant Accounting Policies [Line Items]
Expected period of payment upon termination of agreement				30 days
Minimum | Certificates of Deposit
Summary Of Significant Accounting Policies [Line Items]
Short-term marketable securities, maturity period				4 months
Minimum | Management Fee Income Contract
Summary Of Significant Accounting Policies [Line Items]
Contract term				one
Maximum | Certificates of Deposit
Summary Of Significant Accounting Policies [Line Items]
Short-term marketable securities, maturity period				24 months
Maximum | Management Fee Income Contract
Summary Of Significant Accounting Policies [Line Items]
Contract term				ten years