Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Feb. 17, 2022
Operating Loss Carryforwards [Line Items]
Increase in valuation allowance on deferred tax assets related to net operating loss carryforwards	$ (3,500,000)
Increase in income tax expense			$ 2,700,000
Capital loss carryforwards	145,330,000	$ 149,608,000
Unrealized gain	39,200,000
Valuation allowance	148,754,000	152,295,000
Tax effect related to interest rate swap agreements	2,830,000	5,964,000
Unrecognized tax benefits	0	1,100,000	1,061,000
Unrecognized tax benefits that affect our effective tax rate	$ 0
Earliest Tax Year
Operating Loss Carryforwards [Line Items]
Open tax year	2018
Sharecare
Operating Loss Carryforwards [Line Items]
Increase in valuation allowance on deferred tax assets related to net operating loss carryforwards	$ (9,900,000)
Tax credit carryforwards	$ 573,400,000
Tax credit carryforwards, expiration dates	Dec. 31, 2025
Indefinite Carryforward
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 8,000,000.0
Nutrisystem, Inc.
Operating Loss Carryforwards [Line Items]
Capital loss carryforwards				$ 135,400,000
International
Operating Loss Carryforwards [Line Items]
Operating loss carry forwards valuation allowance	2,400,000
Operating loss carryforwards	8,300,000
State
Operating Loss Carryforwards [Line Items]
Increase in valuation allowance on deferred tax assets related to net operating loss carryforwards		$ (2,700,000)	1,800,000
Reduction in deferred tax asset related to income tax credits			$ 900,000
Operating loss carry forwards valuation allowance	11,000,000.0
Operating loss carryforwards	$ 344,100,000
State | Earliest Tax Year
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, expiration dates	Dec. 31, 2026
State | Latest Tax Year
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, expiration dates	Dec. 31, 2040