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REVENUE FROM CONTRACTS WITH CUSTOMERS - Additional Information (Details) - USD ($) | 3 Months Ended | 9 Months Ended
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Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Interchange income | $ 319,000 | $ 323,000 | $ 869,000 | $ 909,000
Cardholder Rewards [Member] |  |  |  |
Interchange income | $ 31,000 | $ 37,000 | $ 86,000 | $ 105,000

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