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Schedule II. Condensed Financial Statements of Parent Company (Condensed Balance Sheets) (Details) - $ / shares
Dec. 31, 2025
Dec. 31, 2024
Condensed Balance Sheet Statements, Captions [Line Items]    
Common stock, par value per share (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 75,000,000 75,000,000
Common stock, shares issued (in shares) 25,522,051 25,378,291
Common stock, shares outstanding (in shares) 25,522,051 25,378,291
United Fire Group, Inc.    
Condensed Balance Sheet Statements, Captions [Line Items]    
Common stock, par value per share (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 75,000,000 75,000,000
Common stock, shares issued (in shares) 25,522,051 25,378,291
Common stock, shares outstanding (in shares) 25,522,051 25,378,291