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Manufacturing Consolidation Project and Tax Strategy (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended 12 Months Ended
Jun. 29, 2012
Dec. 30, 2011
Liability $ 382 $ 0
Costs incurred and charged to expense 1,252 1,060
Cash payments (906) (678)
Liability 728 382
Total costs incurred to date 2,312  
Total costs expected to be incurred 6,000  
One-Time Termination Benefits [Member]
    
Liability 36 0
Costs incurred and charged to expense 503 36
Cash payments (105) 0
Liability 434 36
Total costs incurred to date 539  
Total costs expected to be incurred 1,474  
Other Restructuring [Member]
    
Liability 346 0
Costs incurred and charged to expense 749 1,024
Cash payments (801) (678)
Liability 294 346
Total costs incurred to date 1,773  
Total costs expected to be incurred $ 4,526