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STOCK-BASED COMPENSATION (Schedule of Restricted Stock Units Activity) (Details) - Restricted Stock Units (RSUs)
6 Months Ended
Mar. 31, 2017
$ / shares
shares
Number of Restricted Stock Units  
Outstanding Beginning Balance (in shares) | shares 159,988
Granted, Number of Restricted Stock Units (in shares) | shares 61,100
Vested, Number of Restricted Stock Units (in shares) | shares (27,551)
Outstanding Ending Balance (in shares) | shares 193,537
Weighted Average Fair Value Per Share  
Outstanding Beginning Balance (in USD per share) | $ / shares $ 43.12
Granted, (USD per share) | $ / shares 39.65
Vested (in USD per share) | $ / shares 39.08
Outstanding Ending Balance (in USD per share) | $ / shares $ 42.60