STOCK-BASED COMPENSATION (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) shares	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Plan $ / shares shares	Sep. 30, 2014 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock option plans | Plan			2
Recognized compensation expense | $	$ 167	$ 65	$ 351	$ 204
Recognized compensation expense, net of tax | $	$ 108	$ 43	$ 228	$ 133
Employers Mutual Casualty Company Incentive Stock Option 2003 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Registered shares (in shares)	2,250,000		2,250,000
Time limit for granting awards			10 years	10 years
Employers Mutual Casualty Company Stock Incentive 2007 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Registered shares (in shares)	3,000,000		3,000,000
Time limit for granting awards			10 years	10 years
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			4 years	4 years
Number of restricted stock shares granted during period (in shares)			117,146
Number of restricted stock shares vested during period (in shares)			40,941
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			5 years	5 years
Options exercised during period (in shares)			274,219
Weighted average exercise price of options exercised during period (in dollars per share) | $ / shares			$ 14.69