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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]  
Amount Accrued
Changes to the Company's termination benefits are as follows (in thousands):
 
Years ended December 31,
 
2012
 
2011
Beginning balance
$
3,335

 
$
1,105

Accruals
473

 
2,230

Plan termination
(3,808
)
 
—

Ending balance
$
—

 
$
3,335