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ORGANIZATION - Narrative (Details) $ in Thousands		3 Months Ended		12 Months Ended
	Oct. 03, 2022 USD ($)	Mar. 31, 2023 USD ($) segment	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)
Organization Basis Of Presentation [Line Items]
Number of reportable segments | segment		6
Assets		$ 261,500,000		$ 252,702,000
Issuance of preferred stock			$ 0
Alliance Bernstein
Organization Basis Of Presentation [Line Items]
Economic interest		61.00%		61.00%
Corporate Solutions Life Reinsurance Company | Alliance Bernstein
Organization Basis Of Presentation [Line Items]
Assets	$ 2,800,000
Direct insurance liabilities ceded	4,100,000
Corporate Solutions Life Reinsurance Company | Alliance Bernstein | GMxB derivative features’ liability
Organization Basis Of Presentation [Line Items]
Guarantees	1,200,000
Separate account, liability, ceded	5,300,000
Number of Employees, Total | Reinsurance Transaction
Organization Basis Of Presentation [Line Items]
Deferred variable annuity	$ 360
Massachusetts Domiciled Insurance Company
Organization Basis Of Presentation [Line Items]
Guaranteed credit rate (as a percent)	3.00%
Guaranteed credit amount of general account assets	$ 4,000,000
Reinsurance, guaranteed credit amount of separate account assets	$ 5,000,000
Massachusetts Domiciled Insurance Company | Number of Employees, Total | Reinsurance Transaction
Organization Basis Of Presentation [Line Items]
Concentration risk, percentage	50.00%

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