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CASH DIVIDENDS (Details) - $ / shares | 1 Months Ended | 12 Months Ended
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Jan. 31, 2020 | Jan. 31, 2019 | Oct. 31, 2018 | Jul. 31, 2018 | Apr. 30, 2018 | Oct. 31, 2017 | Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2018
CASH DIVIDENDS |  |  |  |  |  |  |  |  |
Regular cash dividend declared per common stock |  |  |  |  |  |  | $ 1.00 | $ 1.00 | $ 1.00
Regular cash dividend paid per common stock | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 | $ 1.00 |  |  |

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