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COMPENSATION PROGRAMS - Schedule of Restricted Stock Awards (Details) - USD ($)
3 Months Ended 12 Months Ended
Feb. 29, 2016
Jan. 31, 2016
Jul. 31, 2015
Jan. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Grant date fair value per share (in dollars per share)     $ 11.41   $ 8.63        
Total original grants (in shares)     35,000   128,609        
Equity instruments other than options, nonvested, number of shares [Roll Forward]                  
Unvested stock awards outstanding at beginning of period (in shares)         288,861        
Grants (in shares)     35,000   128,609        
Vestings (in shares)         (118,784)        
Unvested stock awards outstanding at end of period (in shares)         298,686        
Equity instruments other than options, nonvested, weighted average grant date fair value [Abstract]                  
Unvested stock awards outstanding at beginning of period (in dollars per share)         $ 11.98        
Grants (in dollars per share)     $ 11.41   8.63        
Vestings (in dollars per share)         12.17        
Unvested stock awards outstanding at end of period (in dollars per share)         $ 10.46        
Common stock dividend payable         $ 25,592,000       $ 25,979,000
Long-term Equity Based Awards [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Grant date fair value per share (in dollars per share) $ 8.03     $ 8.83 $ 5.66     $ 12.45  
Total original grants (in shares) 269,354     247,512       242,505  
Equity instruments other than options, nonvested, number of shares [Roll Forward]                  
Grants (in shares) 269,354     247,512       242,505  
Equity instruments other than options, nonvested, weighted average grant date fair value [Abstract]                  
Grants (in dollars per share) $ 8.03     $ 8.83 $ 5.66     $ 12.45  
Long term incentive compensation expense         $ 433,000 $ 328,000      
Common stock dividend payable         $ 394,000        
Long-term Equity Based Awards [Member] | December 2013 [Member]                  
Equity instruments other than options, nonvested, number of shares [Roll Forward]                  
Forfeitures (in shares)         (36,467)        
Long-term Equity Based Awards [Member] | December 2015 [Member]                  
Equity instruments other than options, nonvested, number of shares [Roll Forward]                  
Forfeitures (in shares)         (37,199)        
Service-Based Stock Awards [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Grant date fair value per share (in dollars per share) $ 9.32 $ 7.87         $ 12.47 $ 12.34  
Total original grants (in shares) 67,337 61,272         37,237 35,703  
Equity instruments other than options, nonvested, number of shares [Roll Forward]                  
Grants (in shares) 67,337 61,272         37,237 35,703  
Equity instruments other than options, nonvested, weighted average grant date fair value [Abstract]                  
Grants (in dollars per share) $ 9.32 $ 7.87         $ 12.47 $ 12.34  
Stock Awards Activity [Member]                  
Equity instruments other than options, nonvested, weighted average grant date fair value [Abstract]                  
Long term incentive compensation expense         $ 212,000 280,000      
Other general and administrative expense         100,000 $ 115,000      
Total of unrecognized compensation expense for unvested stock award         $ 1,800,000        
Compensation cost not yet recognized, period for recognition         1 year 7 months 6 days        
Common stock dividend payable         $ 285,000        
Stock Awards Activity [Member] | February 2017 [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Grant date fair value per share (in dollars per share)         $ 11.67        
Total original grants (in shares)         62,137        
Equity instruments other than options, nonvested, number of shares [Roll Forward]                  
Grants (in shares)         62,137        
Equity instruments other than options, nonvested, weighted average grant date fair value [Abstract]                  
Grants (in dollars per share)         $ 11.67        
Stock Awards Activity [Member] | January 2016 [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Grant date fair value per share (in dollars per share)         $ 12.17        
Total original grants (in shares)         118,784        
Equity instruments other than options, nonvested, number of shares [Roll Forward]                  
Grants (in shares)         118,784        
Equity instruments other than options, nonvested, weighted average grant date fair value [Abstract]                  
Grants (in dollars per share)         $ 12.17