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EMPLOYEE BENEFIT PLANS - Incentive Compensations Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common stock shares reserved   10,646,729   10,646,729    
Shares available for grant   2,385,248   2,385,248    
Stock based compensation expense   $ 2,200 $ 3,300 $ 8,776 $ 9,508  
Restricted stock grants- shares       600,618    
Weighted average grant date fair value (in dollars per share)       $ 7.15    
Stock option grants- shares       1,256,043    
Phantom Share Units (PSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Deferred compensation payout period 3 years          
Noncurrent deferred compensation liability   900   $ 900    
Share-based compensation expense       $ 900    
Performance cash            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award requisite service period       3 years    
Performance cash compensation liability   6,800   $ 6,800   $ 14,200
Performance cash compensation expense   $ (800) $ 3,100 $ 600 $ 5,600