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FAIR VALUE MEASUREMENTS - Schedule of Carrying Value and Estimated Fair Values of Financial Instruments not Carried at Fair Value (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024 | Nov. 23, 2021
--- | --- | --- | ---
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Carrying Value | $ 101,838 | $ 102,573 |
Estimated Fair Value | 101,195 | 101,567 |
Surplus note |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Carrying Value | $ 1,838 | $ 2,573 |
Unsecured Debt | 5.625% Senior Unsecured Notes Due 2026 |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Stated percentage | 5.625% | 5.625% | 5.625%
Carrying Value | $ 100,000 | $ 100,000 |
Surplus note | Surplus note |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Carrying Value | 1,838 | 2,573 |
Estimated Fair Value | 1,782 | 2,481 |
5.625% Senior unsecured notes |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Carrying Value | 100,000 | 100,000 |
Estimated Fair Value | $ 99,413 | $ 99,086 |

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