Quarterly report pursuant to Section 13 or 15(d)

RESTRUCTURING CHARGES - Narrative (Details)

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RESTRUCTURING CHARGES - Narrative (Details)
$ in Thousands
 1 Months Ended 2 Months Ended 3 Months Ended 6 Months Ended
Apr. 30, 2016
position
Nov. 30, 2015
position
Dec. 31, 2015
USD ($)
Jun. 30, 2017
USD ($)
position
Jun. 30, 2016
USD ($)
Sep. 30, 2016
USD ($)
Restructuring Cost and Reserve [Line Items]            
Payments for Restructuring       $ 883 $ 1,368  
Restructuring costs       2,335 2,052  
Severance and Benefits            
Restructuring Cost and Reserve [Line Items]            
Payments for Restructuring       472 1,029  
Restructuring costs       1,570 1,489  
Facilities            
Restructuring Cost and Reserve [Line Items]            
Payments for Restructuring       411 339  
Restructuring costs       $ 756 563  
Fiscal 2018 Restructuring Plan            
Restructuring Cost and Reserve [Line Items]            
Positions eliminated (positions) | position       49    
Payments for Restructuring       $ 500    
Restructuring costs       1,600    
Fiscal 2018 Restructuring Plan | Severance and Benefits            
Restructuring Cost and Reserve [Line Items]            
Restructuring costs       1,600    
Fiscal 2017 April Restructuring Plan            
Restructuring Cost and Reserve [Line Items]            
Positions eliminated (positions) | position 29          
Payments for Restructuring           $ 1,500
Fiscal 2016 Restructuring Plan            
Restructuring Cost and Reserve [Line Items]            
Positions eliminated (positions) | position   65        
Restructuring costs     $ 2,000      
Fiscal 2016 Restructuring Plan | Severance and Benefits            
Restructuring Cost and Reserve [Line Items]            
Restructuring costs         1,500  
Fiscal 2016 Restructuring Plan | Facilities            
Restructuring Cost and Reserve [Line Items]            
Restructuring costs       $ 800 $ 600