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REVENUE FROM CONTRACTS WITH CUSTOMERS - Additional Information (Details) - USD ($) | 12 Months Ended
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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

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