Schedule II. Condensed Financial Statements of Parent Company (Condensed Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets
Cash and cash equivalents	$ 102,046	$ 96,650
Other assets	123,496	88,672
Total assets	3,144,190	2,882,286
Liabilities and stockholders' equity
Liabilities	2,410,445	2,142,172
Stockholders' equity
Common stock, $0.001 par value, authorized 75,000,000 shares 25,269,842 and 25,210,541 issued and outstanding in 2023 and 2022, respectively	25	25
Additional paid-in capital	209,986	207,030
Retained earnings	574,691	620,555
Accumulated other comprehensive income, net of tax	(50,957)	(87,496)
Total stockholders' equity	733,745	740,114	$ 879,121	$ 825,149
Total liabilities and stockholders' equity	3,144,190	2,882,286
United Fire Group, Inc.
Assets
Available-for-sale, at fair value (amortized cost $0 in 2023 and $0 in 2022)	0	0
Investment in subsidiary	733,152	738,098
Cash and cash equivalents	553	2,038
Other assets	199	134
Total assets	733,904	740,270
Liabilities and stockholders' equity
Liabilities	159	156
Stockholders' equity
Common stock, $0.001 par value, authorized 75,000,000 shares 25,269,842 and 25,210,541 issued and outstanding in 2023 and 2022, respectively	25	25
Additional paid-in capital	209,986	207,029
Retained earnings	574,691	620,556
Accumulated other comprehensive income, net of tax	(50,957)	(87,496)
Total stockholders' equity	733,745	740,114
Total liabilities and stockholders' equity	$ 733,904	$ 740,270