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Leases (Tables)
 12 Months Ended
Dec. 31, 2012
Leases [Abstract]  
Future annual minimum rental commitments
Future annual minimum rental commitments as of December 31, 2012 are as follows (in thousands):
 
Fiscal Years
 
2013
$
3,962

2014
4,074

2015
3,571

2016
2,809

2017
2,581

Thereafter
6,490

Total
$
23,487