INCOME TAXES - Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Federal statutory income tax at 21%	$ 6,992	$ 6,732	$ 5,291
Tax exempt interest income	(1,065)	(1,027)	(968)
Revaluation of net deferred tax assets due to change in U.S. federal statutory income tax rate	0	0	(6)
Earnings of bank owned life insurance	(182)	(192)	(113)
Nondeductible expenses	356	462	566
Other	(206)	(197)	(171)
Total	$ 5,895	$ 5,778	$ 4,599