INCOME TAXES - Schedule of Components of Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Provision or benefit for income taxes
Currently payable									$ 3,527	$ 3,680	$ 3,328
Deferred benefit									209	124	123
Total provision	$ 1,106	$ 957	$ 825	$ 848	$ 652	$ 1,576	$ 875	$ 701	$ 3,736	$ 3,804	$ 3,451