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Manufacturing Consolidation Project and Tax Strategy (Details) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended 12 Months Ended
Sep. 28, 2012
Dec. 30, 2011
Liability $ 382 $ 0
Costs incurred and charged to expense 1,980 1,060
Cash payments (1,369) (678)
Liability 993 382
Total costs incurred to date 3,040  
Total costs expected to be incurred 6,000  
One-Time Termination Benefits [Member]
    
Liability 36 0
Costs incurred and charged to expense 665 36
Cash payments (99) 0
Liability 602 36
Total costs incurred to date 701  
Total costs expected to be incurred 1,437  
Other Restructuring [Member]
    
Liability 346 0
Costs incurred and charged to expense 1,315 1,024
Cash payments (1,270) (678)
Liability 391 346
Total costs incurred to date 2,339  
Total costs expected to be incurred $ 4,563