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Restructurings and Lease Terminations (Tables)
 12 Months Ended
Dec. 31, 2012
Restructuring and Related Activities [Abstract]  
Schedule of Accrual and Usage of Restructuring Charges
The following table summarizes the accrual and usage of the restructuring charges (in thousands):
 
 
Leases
 
Severance
 
Total
Ending balance, December 31, 2009
$
149

 
$
672

 
$
821

Restructuring charge, net of restructuring benefit
—

 
—

 
—

Cash payments
(149
)
 
(365
)
 
(514
)
Ending balance, December 31, 2010
—

 
307

 
307

Restructuring charge, net of restructuring benefit
651

 
4,235

 
4,886

Cash payments
(58
)
 
(1,231
)
 
(1,289
)
Ending balance, December 31, 2011
593

 
3,311


3,904

Restructuring charge, net of restructuring benefit
33

 
373

 
406

Cash Payments
(109
)
 
(3,560
)
 
(3,669
)
Ending balance, December 31, 2012
$
517

 
$
124

 
$
641

Current portion of accrued restructuring
$
151

 
$
124

 
$
275

Long-term portion of accrued restructuring
$
366

 
$
—

 
$
366