EMPLOYEE BENEFITS (Profit-Sharing Plan and ESOP) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
ESOP, Minimum requisite service period	1 year
ESOP, minimum participant age	21 years
Number of United Fire Group, Inc. common stock shares owned in the ESOP	220,468	224,041
Employer contributions to ESOP		$ 100	$ 175
Profit-Sharing Plan [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Employer contribution to the profit-sharing plan	$ 6,029	$ 1,812	$ 1,092