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CASH DIVIDENDS (Details) - $ / shares
1 Months Ended 12 Months Ended
Sep. 30, 2018
Jul. 31, 2018
Apr. 30, 2018
Oct. 31, 2017
Sep. 30, 2017
Sep. 30, 2016
Jan. 31, 2019
Jan. 31, 2018
Jan. 31, 2017
CASH DIVIDENDS                  
Regular cash dividend declared per common stock         $ 1.00 $ 0.70 $ 1.00 $ 1.00 $ 1.00
Regular cash dividend paid per common stock $ 0.25 $ 0.25 $ 0.25 $ 1.00          
Special Cash dividend declared per common stock           $ 0.30