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FAIR VALUE MEASUREMENTS - Narrative (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 USD ($) fund | Dec. 31, 2023 USD ($) fund
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Transfers into Level 3 | $ 0 | $ 0
Transfers into Level 3 | 0 | 0
Transfers out of level 3 | 0 | 0
Transfers out of level 3 | $ 0 | $ 0
Number of investment funds transferred from level 3 to NAV practical expedient | fund | 1 | 2
Fixed maturities, held to maturity, at amortized cost | $ 443,400 | $ 686,296
Fair value | 436,751 | 675,851
Advances from FHLB, carrying value | 66,380 | 85,790
Advances from FHLB, fair value | 66,000 | 86,000
Reported Value Measurement |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Senior notes | 1,315,000 | 1,314,000
Estimate of Fair Value |  |
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] |  |
Senior notes | $ 1,247,000 | $ 1,198,000

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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478878/942-470-45-1 + Details
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