REVENUE FROM CONTRACTS WITH CUSTOMERS - Additional Information (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interchange income	$ 1,238,000	$ 1,251,000	$ 1,164,000
Loss on sale of OREO	0	(58,000)	0
Cardholder Rewards [Member]
Interchange income	$ 138,000	$ 134,000	$ 129,000

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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