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Restructuring (Tables)
 9 Months Ended
Sep. 30, 2013
Restructuring and Related Activities [Abstract]  
Schedule of accrual and usage of the restructuring charges
The following table summarizes the accrual and usage of the restructuring charges for the nine months ended September 30, 2013 (in thousands):

 
Leases
 
Severance
 
Total
Beginning balance, January 1, 2013
$
517

 
$
124


$
641

        Restructuring charge
—

 
891

 
891

        Cash payments
(122
)
 
(821
)
 
(943
)
Ending balance, September 30, 2013
$
395

 
$
194

 
$
589

Current portion of accrued restructuring included in other current liabilities
$
105

 
$
194

 
$
299

Long-term portion of accrued restructuring included in other liabilities
$
290

 
$
—

 
$
290