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INVESTMENTS - Narrative (Details) - USD ($) $ in Thousands |  | 9 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 01, 2021 | Sep. 30, 2021 | Sep. 30, 2022 | Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Fair value of securities transferred from available for sale to fixed maturities, held to maturity | $ 405,000 | $ 405,000 |  |
Net carrying value of fixed investments held to maturity |  |  | $ 690,380 | $ 446,016
Allowance for expected credit losses |  |  | 0 | 0
ABS |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Net carrying value of fixed investments held to maturity |  |  | 613,180 | 408,316
Allowance for expected credit losses |  |  | 0 | 0
Corporate debt |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Net carrying value of fixed investments held to maturity |  |  | 77,200 | 37,700
Allowance for expected credit losses |  |  | $ 0 | $ 0

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