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Commitments and Contingencies - Purchase Commitments (Details) (USD $)
In Thousands, unless otherwise specified
Jan. 26, 2013
Commitments and Contingencies Disclosure [Abstract]  
Conditional purchase commitment $ 1,000
Purchase Obligation, Fiscal Year Maturity  
2013 713
2014 1,142
2015 399
2016 300
2017 250
Thereafter 200
Total $ 3,004