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CASH DIVIDENDS (Details) - $ / shares |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 10, 2018 | Apr. 10, 2017 | Oct. 31, 2017 | Sep. 30, 2017 | Oct. 28, 2016 | Sep. 30, 2016 | Sep. 30, 2015 | Jan. 31, 2018 | Jan. 31, 2017 | Jan. 31, 2016
CASH DIVIDENDS |  |  |  |  |  |  |  |  |  |
Regular cash dividend declared per common stock |  |  |  | $ 1.00 |  | $ 0.70 | $ 0.70 | $ 1.00 | $ 1.00 | $ 0.70
Regular cash dividend paid per common stock |  |  | $ 1.00 |  | $ 0.70 |  |  |  |  |
Dividend record date |  | Apr. 20, 2018 |  | Oct. 20, 2017 |  |  |  |  |  |
Regular quarterly cash dividend declared per common stock | $ 0.25 |  |  |  |  |  |  |  |  |
Special Cash dividend declared per common stock |  |  |  |  |  | $ 0.30 |  |  |  |
Special cash dividend paid per common stock |  |  |  |  | $ 0.30 |  |  |  |  |
Dividend declared date |  | Apr. 10, 2018 |  |  |  |  |  |  |  |
Dividend declared payment date |  | Apr. 30, 2018 |  |  |  |  |  |  |  |

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