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RELATED-PARTY TRANSACTIONS - Consulting Agreement for the Bank (Details) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Nov. 30, 2016 | Dec. 31, 2017
Mr. Carlos Salas |  |
Related Party Transaction [Line Items] |  |
Salary |  | $ 17
Chief Executive Officer Of COR Clearing, LLC | Management and Services Agreement |  |
Related Party Transaction [Line Items] |  |
Expenses from transactions with related parties | $ 108 |

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