REVENUE FROM CONTRACTS WITH CUSTOMERS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Interchange income	$ 326	$ 300	$ 616	$ 566
Gain on sale of OREO	26	0	26	0
Cardholder rewards [Memebr]
Interchange income	$ 34	$ 32	$ 63	$ 62

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

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