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 ($)
12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Share-based compensation by type of award:      
Total share-based compensation expense $ 6,698,000 $ 8,916,000 $ 11,583,000
Stock options      
Share-based compensation by type of award:      
Total share-based compensation expense 0 2,000 617,000
Restricted stock      
Share-based compensation by type of award:      
Total share-based compensation expense 6,230,000 8,220,000 10,102,000
Stock purchase plan      
Share-based compensation by type of award:      
Total share-based compensation expense $ 468,000 $ 694,000 $ 864,000