Restructuring (Tables)
 12 Months Ended
Dec. 31, 2013
Restructuring and Related Activities [Abstract]  
Summary of accrued restructuring expenses
The following table sets forth a summary of accrued restructuring expenses for 2013 and 2012 (in thousands):
 
December 31,
2012
 
Cash
Payments
 
Additions
 
Adjustments
 
December 31,
2013
Severance and termination-related costs
$
589

 
$
(2,147
)
 
$
1,706

 
$
(7
)
 
$
141

Facilities related costs
289

 
(55
)
 
—

 
—

 
234

Total accrued restructuring expenses
$
878

 
$
(2,202
)
 
$
1,706

 
$
(7
)
 
$
375

 
 
December 31,
2011
 
Cash
Payments
 
Additions
 
Adjustments
 
December 31,
2012
Severance and termination-related costs
$
—

 
$
(422
)
 
$
1,198

 
$
(187
)
 
$
589

Facilities related costs
443

 
(258
)
 
209

 
(105
)
 
289

Total accrued restructuring expenses
$
443

 
$
(680
)
 
$
1,407

 
$
(292
)
 
$
878