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RESTRUCTURING COSTS AND ACCRUALS (Tables)
 9 Months Ended
Sep. 30, 2017
Restructuring and Related Activities [Abstract]  
Schedule of Restructuring and Related Costs
The following table sets forth the activity in the restructuring accruals for the nine months ended September 30, 2017 (in thousands):
 
Employee-
Related
 
Facilities/Other-Related
 
Total
Accrual balance as of December 31, 2016
$
7,018

 
$
3,093

 
$
10,111

New restructuring charges – operating expenses
1,930

 
1,485

 
3,415

Revisions of estimated liabilities
(902
)
 
760

 
(142
)
Non-cash write-offs
—

 
3,191

 
3,191

Accretion
—

 
278

 
278

Cash payments
(5,479
)
 
(2,970
)
 
(8,449
)
Foreign exchange impact on ending balance
(46
)
 
15

 
(31
)
Accrual balance as of September 30, 2017
$
2,521

 
$
5,852

 
$
8,373