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SHARE-BASED COMPENSATION, Stock Option and Restricted Stock Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended 19 Months Ended 79 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2019
Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock options granted (in shares) 0 0 0    
Options outstanding (in shares) 0 0 0 0 0
Additional Disclosures [Abstract]          
Vested share-based awards withheld to satisfy income tax obligations (in shares) 40,092 57,725      
Vested share-based awards withheld to satisfy income tax obligations $ 3,900 $ 4,400      
Restricted Stock [Member]          
Number of Shares [Roll Forward]          
Nonvested at beginning of period (in shares) 282,235        
Granted (in shares) 78,645        
Vested (in shares) (133,687)        
Forfeited (in shares) (3,193)        
Nonvested at end of period (in shares) 224,000 282,235   224,000 224,000
Weighted Average Grant-date Fair Value [Roll Forward]          
Nonvested at beginning of period (in dollars per share) $ 51.69        
Granted (in dollars per share) 94.22 $ 80.24 $ 43.15    
Vested (in dollars per share) 49.22        
Forfeited (in dollars per share) 79.36        
Nonvested at end of period (in dollars per share) $ 67.70 $ 51.69   $ 67.70 $ 67.70
Aggregated fair value of restricted shares $ 6,600 $ 6,000 $ 6,000    
Additional Disclosures [Abstract]          
Vested share-based awards withheld to satisfy income tax obligations (in shares) 40,092 57,725      
Vested share-based awards withheld to satisfy income tax obligations $ 3,900 $ 4,400      
2017 Director LTIP [Member] | Restricted Stock [Member]          
Number of Shares [Roll Forward]          
Granted (in shares) 8,798     14,356  
2012 Employee LTIP [Member] | Restricted Stock [Member]          
Number of Shares [Roll Forward]          
Granted (in shares) 69,847       819,423