INVESTMENT IN RELATED PARTY INVESTMENT FUND - Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
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| Schedule of Equity Method Investments [Line Items] | |||||
| Income (loss) from investment in Solasglas | $ (15,133) | $ (14,404) | $ (9,301) | $ (483) | |
| Solasglas Investments, LP (SILP) | GLRE Limited Partners | |||||
| Schedule of Equity Method Investments [Line Items] | |||||
| Equity method investments, fair value | $ 487,400 | $ 487,400 | $ 504,600 | ||
| Equity method investment, ownership interest (as a percent) | 81.90% | 81.90% | 81.40% | ||
| SILP General Partner | |||||
| Schedule of Equity Method Investments [Line Items] | |||||
| Equity method investment, ownership interest (as a percent) | 18.10% | 18.10% | 18.60% | ||
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- Definition Fair value portion of investments accounted under the equity method. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of income (loss) for proportionate share of equity method investee's income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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