Quarterly report pursuant to Section 13 or 15(d)

RESTRUCTURING CHARGES - Summary of Restructuring Expense (Details)

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RESTRUCTURING CHARGES - Summary of Restructuring Expense (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Restructuring Cost and Reserve [Line Items]        
Restructuring costs $ 15 $ 387 $ 2,067 $ 645
Severance and Benefits        
Restructuring Cost and Reserve [Line Items]        
Restructuring costs (39) 155 1,450 227
Severance and Benefits | Fiscal 2017 April Restructuring Plan        
Restructuring Cost and Reserve [Line Items]        
Restructuring costs     1,500  
Facilities        
Restructuring Cost and Reserve [Line Items]        
Restructuring costs $ 54 $ 232 617 $ 418
Facilities | Fiscal 2017 April Restructuring Plan        
Restructuring Cost and Reserve [Line Items]        
Restructuring costs     $ 400