Schedule II. Condensed Financial Statements of Parent Company (Condensed Balance Sheets) (Details) - USD ($) $ / shares in Units, $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
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)	25,269,842	25,210,541
Common stock, shares outstanding (in shares)	25,269,842	25,210,541
United Fire Group, Inc.
Condensed Balance Sheet Statements, Captions [Line Items]
Fixed maturities, Available-for-sale securities, amortized cost	$ 0	$ 0
Common stock, par value per share (in dollars per share)	$ 0.001
Common stock, shares authorized (in shares)	75,000,000
Common stock, shares issued (in shares)	25,269,842	25,210,541