INCOME TAXES - Deferred Income Tax Assets and (Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Components of Deferred Tax Assets and Liabilities
Allowance for loan losses	$ 7,141	$ 3,310
Minimum pension liability	1,544	1,589
SERP/RSU	1,039	652
Other	1,209	10
Total gross deferred tax assets	10,933	5,561
Depreciation	(1,733)	(1,505)
Pension	(262)	(164)
Unrealized gain on securities available-for-sale	(2,320)	(1,088)
Holding gain on equity securities	(3,893)	(3,838)
Goodwill	(2,498)	(2,134)
Total gross deferred tax liabilities	(10,706)	(8,729)
Net deferred tax assets	$ 227
Net deferred tax liabilities		$ (3,168)