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EARNINGS PER SHARE (Narrative) (Details) - $ / shares | Dec. 31, 2017 | Sep. 30, 2017 | Dec. 31, 2016 | Sep. 30, 2016
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Earnings Per Share [Abstract] |  |  |  |
Outstanding options to purchase shares of common stock which are not included in the computation of diluted earnings per share |  |  | 188,276 | 188,276
Weighted average price outstanding options to purchase shares of common stock which are not included in the computation of diluted earnings per share (in dollars per share) |  |  | $ 14.61 | $ 14.61

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