Annual report pursuant to Section 13 and 15(d)

STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION - Schedule of Share-based Compensation by Type of Award (Details)

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STOCK INCENTIVE PLANS AND SHARE-BASED COMPENSATION - Schedule of Share-based Compensation by Type of Award (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Share-based compensation by type of award:      
Total share-based compensation expense $ 8,916 $ 11,583 $ 13,459
Stock purchase plan      
Share-based compensation by type of award:      
Total share-based compensation expense 694 864 1,277
Stock options      
Share-based compensation by type of award:      
Total share-based compensation expense 2 617 826
Restricted stock      
Share-based compensation by type of award:      
Total share-based compensation expense $ 8,220 $ 10,102 $ 11,356