Quarterly report pursuant to Section 13 or 15(d)

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION - Summary of Activity Relating to Restricted Stock Units (Details)

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STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION - Summary of Activity Relating to Restricted Stock Units (Details) - Restricted stock units - $ / shares
shares in Thousands
3 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Shares    
Nonvested, beginning balance (shares) 1,765  
Granted (shares) 83  
Vested (shares) (52)  
Forfeited (shares) (27)  
Nonvested, ending balance (shares) 1,769  
Weighted-Average Grant Date Fair Value Per Share    
Nonvested, beginning balance (usd per share) $ 6.75  
Granted (usd per share) 7.82 $ 3.84
Vested (usd per share) 5.66  
Forfeited (usd per share) 7.48  
Nonvested, ending balance (usd per share) $ 6.82