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Restructuring Charges (Tables)
 12 Months Ended
Dec. 31, 2016
Restructuring and Related Activities [Abstract]  
Summary of Restructuring Activities
The following table sets forth a summary of restructuring activities during the years ended December 31, 2016 and 2015 (in thousands):
 
Severance and related costs
 
Facilities costs
 
Total costs
Balance, December 31, 2014
$
—

 
$
765

 
$
765

Provision for restructuring charges
—

 
—

 
—

Cash payments
—

 
(548
)
 
(548
)
Balance, December 31, 2015
$
—

 
$
217

 
$
217

Provision for restructuring charges
21,529

 
1,492

 
23,021

Cash payments
(20,308
)
 
(1,201
)
 
(21,509
)
Other adjustments
—

 
1,738

 
1,738

Balance, December 31, 2016
$
1,221

 
$
2,246

 
$
3,467