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SHAREHOLDERS’ EQUITY AND REGULATORY CAPITAL - Narrative (Details) - USD ($) | 13 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2016 | Jan. 19, 2016 | Sep. 14, 2015
Equity [Abstract] |  |  |
Aggregate capital, amount |  | $ 100,000,000 |
Equity, Class of Treasury Stock [Line Items] |  |  |
Number of shares authorized to be repurchased |  |  | 416,000
Acquisition of treasury stock (in shares) | 82,725 |  |
Acquisition of treasury stock | $ 1,438,000 |  |
Acquisition of treasury stock (in usd per share) | $ 17.38 |  |
Maximum |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Stock repurchase program authorized, maximum percentage of outstanding shares of common stock |  |  | 5.00%

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