Quarterly report pursuant to Section 13 or 15(d)

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION - Narrative (Details)

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STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION - Narrative (Details) - $ / shares
3 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Restricted stock units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted-average grant date fair values of RSUs granted (usd per share) $ 7.82 $ 3.84