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STOCK-BASED COMPENSATION (Narrative) (Details) - USD ($)
1 Months Ended 6 Months Ended
Feb. 28, 2017
Mar. 31, 2017
Mar. 31, 2016
Sep. 30, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Restricted stock granted $ 17,000      
Shares issued, price per share $ 34.24      
Restricted Stock Units (RSUs)        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Vesting period   3 years    
Unvested restricted stock outstanding   193,537   159,988
Compensation expense   $ 1,300,000 $ 2,700,000  
Restricted Stock Units (RSUs) | Chief Executive Officer        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation accelerated vesting shares     60,909  
Restricted Stock Units (RSUs) | Time Based Restricted Stock Unit        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Vesting period   3 years    
Actual amount of RSUs earned based on cumulative earnings   60.00%    
Restricted Stock Units (RSUs) | Performance Based Restricted Stock Unit        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Vesting period   3 years    
Target RSUs granted range   40.00%    
Restricted Stock        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Compensation expense   $ 500,000 $ 400,000  
Restricted Stock | Immediate Vesting        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation vesting rights, percentage 50.00%      
Restricted Stock | Anniversary of Grant Date        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share-based compensation vesting rights, percentage 50.00%