Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details)	1 Months Ended	3 Months Ended		6 Months Ended
	Sep. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) segment unit	Jun. 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		$ 277,600,000		$ 277,600,000		$ 285,900,000
Marketable securities – certificates of deposit		25,086,000		25,086,000		25,024,000
Payments to acquire common stock and warrants	$ 3,000,000
Equity securities		14,404,000		14,404,000		28,393,000
Unrealized gains (losses) recognized on equity securities held at end of period		(2,059,000)	$ 83,769,000	$ (12,614,000)	$ 83,769,000
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
Equity method investment, other than temporary impairment				0	$ 0
Fiduciary accounts payable		6,071,000		6,071,000		10,534,000
Contract liabilities		20,030,000		20,030,000		16,798,000
Accounts Payable and Accrued Expenses
Summary Of Significant Accounting Policies [Line Items]
Accrued contract liability recognized				500,000
Interest rate swap
Summary Of Significant Accounting Policies [Line Items]
Derivative assets		1,759,000		1,759,000
Contingent Equity Securities
Summary Of Significant Accounting Policies [Line Items]
Derivative assets		3,225,000		3,225,000		4,270,000
Contingent equity securities		3,200,000		3,200,000		4,300,000
Level 2
Summary Of Significant Accounting Policies [Line Items]
Marketable securities – certificates of deposit		0		0		0
Equity securities		0		0		4,270,000
Level 2 | Interest rate swap
Summary Of Significant Accounting Policies [Line Items]
Derivative assets		1,759,000		1,759,000
Level 2 | Contingent Equity Securities
Summary Of Significant Accounting Policies [Line Items]
Derivative assets		0		0		0
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		1,800,000		1,800,000
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]
Contract term				10 years
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
Maximum | Certificates of Deposit
Summary Of Significant Accounting Policies [Line Items]
Short-term marketable securities, maturity period				24 months