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, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Restructuring Cost and Reserve [Line Items]        
Restructuring costs $ 31 $ 15 $ 2,366 $ 2,067
Severance and Benefits        
Restructuring Cost and Reserve [Line Items]        
Restructuring costs 29 (39) 1,599 1,450
Facilities        
Restructuring Cost and Reserve [Line Items]        
Restructuring costs 2 54 758 617
Other        
Restructuring Cost and Reserve [Line Items]        
Restructuring costs $ 0 $ 0 $ 9 $ 0