INCOME TAXES, PROVISION FOR FEDERAL INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Provision for federal income taxes [Abstract]
Income taxes currently payable									$ 3,515	$ 4,280	$ 3,194
Deferred income tax provision (benefit)									928	(58)	192
Provision for income taxes	$ 1,337	$ 995	$ 1,043	$ 1,068	$ 1,013	$ 922	$ 1,205	$ 1,082	$ 4,443	$ 4,222	$ 3,386