INCOME TAXES - Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal statutory income tax at 21% for 2019 and 2018, and 35% for 2017	$ 6,732	$ 5,291	$ 7,937
Tax exempt interest income	(1,027)	(968)	(1,560)
Revaluation of net deferred tax assets due to change in U.S. federal statutory income tax rate	0	(6)	1,695
Earnings of bank owned life insurance	(192)	(113)	(161)
Nondeductible expenses	462	566	577
Other	(197)	(171)	(250)
Total	$ 5,778	$ 4,599	$ 8,238