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STATUTORY REPORTING, CAPITAL REQUIREMENTS AND DIVIDENDS AND RETAINED EARNINGS RESTRICTIONS - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
United Fire & Casualty Company |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Intercompany dividend payments | $ 21,700 | $ 22,800 | $ 13,200
State of Iowa Insurance Department |  |  |
Statutory Accounting Practices [Line Items] |  |  |
Statutory amount available for dividend payments | $ 50,600 |  |

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