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STOCK COMPENSATION (Details) - USD ($)
$ / shares in Units, $ in Thousands
 9 Months Ended 12 Months Ended
Jun. 30, 2020
Sep. 30, 2019
Number of Shares    
Options outstanding, beginning of period (in shares) 59,835  
Granted (in shares) 0  
Exercised (in shares) (41,949)  
Forfeited or expired (in shares) 0  
Options outstanding, end of period (in shares) 17,886 59,835
Options exercisable, end of period (in shares) 17,886  
Weighted Average Exercise Price    
Options outstanding, beginning of period (in dollars per share) $ 8.06  
Granted (in dollars per share) 0  
Exercised (in dollars per share) 6.98  
Forfeited or expired (in dollars per share) 0  
Options outstanding, end of period (in dollars per share) 10.60 $ 8.06
Options exercisable, end of period (in dollars per share) $ 10.60  
Weighted Average Remaining Contractual Term    
Options outstanding (in years) 3 months 1 year 6 months 14 days
Exercised (in years) 1 year 3 days  
Options exercisable term (in years) 3 months  
Aggregate Intrinsic Value    
Options outstanding, beginning of period $ 1,469  
Granted 0  
Exercised 866  
Forfeited or expired 0  
Options outstanding, end of period 135 $ 1,469
Options exercisable, end of period $ 135  
Number of Shares    
Nonvested shares outstanding, beginning of period (in shares) 926,122  
Granted (in shares) 191,372  
Vested (in shares) (276,193)  
Forfeited or expired (in shares) (9,584)  
Nonvested shares outstanding, end of period (in shares) 831,717 926,122
Weighted Average Fair Value at Grant    
Nonvested shares outstanding, beginning of period (in dollars per share) $ 29.54  
Granted (in dollars per share) 32.32  
Vested (in dollars per share) 30.04  
Forfeited or expired (in dollars per share) 31.48  
Nonvested shares outstanding, end of period (in dollars per share) $ 29.99 $ 29.54
Stock based compensation expense not yet recognized in income $ 9,400  
Weighted average remaining period for unrecognized stock based compensation (in years) 2 years 5 months 15 days