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RELATED-PARTY TRANSACTIONS - Transactions with Patriot Affiliates (Details) $ / shares in Units, $ in Thousands | Apr. 06, 2015 USD ($) | Nov. 07, 2014 USD ($) shares | Oct. 30, 2014 USD ($) $ / shares shares | Feb. 24, 2017 shares | Nov. 08, 2014 Branch
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Related Party Transaction [Line Items] |  |  |  |  |
Expenses from transactions with related parties | $ 263 |  |  |  |
Banco Popular North America (BPNA) |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Number of branches | Branch |  |  |  |  | 20
Greater Than 5% Shareholder, Patriot |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Aggregate purchase price |  |  | $ 20,000 |  |
Greater Than 5% Shareholder, Patriot | Equity Support Payment |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Expenses from transactions with related parties |  | $ 538 |  |  |
Greater Than 5% Shareholder, Patriot | Reimbursement of Out-of-Pocket Expenses |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Expenses from transactions with related parties |  | $ 100 |  |  |
Greater Than 5% Shareholder, Patriot | Voting Common Stock |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Common stock, shares outstanding (in shares) | shares |  | 3,100,564 |  | 2,850,564 |
Ownership percentage |  | 9.30% |  |  |
Greater Than 5% Shareholder, Patriot | Voting Common Stock | Voting Common Stock Option One |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Common stock issuable (in shares) | shares |  |  | 1,076,000 |  |
Price per share issuable (in dollars per share) | $ / shares |  |  | $ 9.78 |  |
Greater Than 5% Shareholder, Patriot | Voting Common Stock | Voting Common Stock Option Two |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |
Common stock issuable (in shares) | shares |  |  | 824,000 |  |
Price per share issuable (in dollars per share) | $ / shares |  |  | $ 11.55 |  |

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