Schedule II. Condensed Financial Statements of Parent Company (Condensed Balance Sheets) (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents	$ 96,650	$ 132,104
Other assets	88,672	81,061
Total assets	2,882,286	3,012,721
Liabilities and stockholders' equity
Liabilities	2,142,172	2,133,600
Stockholders' equity
Common stock, $0.001 par value, authorized 75,000,000 shares 25,210,541 and 25,082,104 issued and outstanding in 2022 and 2021, respectively	25	25
Additional paid-in capital	207,030	203,375
Retained earnings	620,555	621,384
Accumulated other comprehensive income, net of tax	(87,496)	54,337
Total stockholders' equity	740,114	879,121	$ 825,149	$ 910,472
Total liabilities and stockholders' equity	2,882,286	3,012,721
United Fire Group, Inc.
Assets
Available-for-sale, at fair value (amortized cost $0 in 2022 and $150 in 2021)	0	150
Investment in subsidiary	738,098	876,868
Cash and cash equivalents	2,038	2,158
Other assets	134	12
Total assets	740,270	879,188
Liabilities and stockholders' equity
Liabilities	156	67
Stockholders' equity
Common stock, $0.001 par value, authorized 75,000,000 shares 25,210,541 and 25,082,104 issued and outstanding in 2022 and 2021, respectively	25	25
Additional paid-in capital	207,029	203,375
Retained earnings	620,556	621,384
Accumulated other comprehensive income, net of tax	(87,496)	54,337
Total stockholders' equity	740,114	879,121
Total liabilities and stockholders' equity	$ 740,270	$ 879,188