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STOCK COMPENSATION (Details) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Jun. 30, 2019
Sep. 30, 2018
Number of Shares    
Options outstanding, beginning of period (in shares) 155,961  
Granted (in shares) 0  
Exercised (in shares) (48,678)  
Forfeited or expired (in shares) (3,027)  
Options outstanding, end of period (in shares) 104,256 155,961
Options exercisable, end of period (in shares) 104,256  
Weighted Average Exercise Price    
Options outstanding, beginning of period (in dollars per share) $ 8.48  
Granted (in dollars per share) 0  
Exercised (in dollars per share) 9.07  
Forfeited or expired (in dollars per share) 10.60  
Options outstanding, end of period (in dollars per share) 8.14 $ 8.48
Options exercisable, end of period (in dollars per share) $ 8.14  
Weighted Average Remaining Contractual Term    
Options outstanding 1 year 2 months 19 days 1 year 9 months 10 days
Options exercisable 1 year 2 months 19 days  
Aggregate Intrinsic Value    
Options outstanding, beginning of period $ 2,974  
Granted 0  
Exercised 802  
Forfeited or expired 33  
Options outstanding, end of period 2,075 $ 2,974
Options exercisable, end of period $ 2,075  
Number of Shares    
Nonvested shares outstanding, beginning of period (in shares) 1,005,813  
Granted (in shares) 296,302  
Vested (in shares) (352,218)  
Forfeited or expired (in shares) (2,679)  
Nonvested shares outstanding, end of period (in shares) 947,218 1,005,813
Weighted Average Fair Value at Grant    
Nonvested shares outstanding, beginning of period (in dollars per share) $ 29.89  
Granted (in dollars per share) 24.84  
Vested (in dollars per share) 26.77  
Forfeited or expired (in dollars per share) 26.14  
Nonvested shares outstanding, end of period (in dollars per share) $ 29.48 $ 29.89
Stock based compensation expense not yet recognized in income $ 13,500  
Weighted average remaining period for unrecognized stock based compensation 3 years 1 month 2 days