INCOME TAXES, PROVISION FOR FEDERAL INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Provision for federal income taxes [Abstract]
Income taxes currently payable									$ 3,694	$ 2,721	$ 3,018
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability									0	0	(224)
Deferred income tax provision (benefit)									419	228	1,478
Provision for income taxes	$ 1,238	$ 961	$ 973	$ 941	$ 1,133	$ 847	$ 486	$ 483	$ 4,113	$ 2,949	$ 4,272