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SHARE-BASED COMPENSATION PLANS (Details)
$ / shares in Units, $ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2018
USD ($)
Employee
$ / shares
shares
Sep. 30, 2017
USD ($)
Dec. 31, 2011
shares
Employees [Member] | Restricted Stock [Member]      
Restricted shares - Employees [Roll Forward]      
Non-vested at beginning of period (in shares) 138,665    
Granted during the year (in shares) 0    
Vested during the year (in shares) (26,500)    
Forfeited during the year (in shares) 0    
Non-vested at end of period (in shares) 112,165    
Weighted-average grant-date fair value - Employees [Abstract]      
Non-vested at beginning of period (in dollars per share) | $ / shares $ 13.55    
Granted during the year (in dollars per share) | $ / shares 0    
Vested during the year (in dollars per share) | $ / shares 9.84    
Forfeited during the year (in dollars per share) | $ / shares 0    
Non-vested at end of period (in dollars per share) | $ / shares $ 14.43    
2011 Equity Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of employees to whom restricted common shares were allocated | Employee 26    
Total compensation cost for the period | $ $ 0.3 $ 0.4  
Restricted shares - Employees [Roll Forward]      
Granted during the year (in shares)     400,000