Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies (Details 2)

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Significant Accounting Policies (Details 2) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 29, 2012
Dec. 31, 2011
Sep. 29, 2012
Land
Dec. 31, 2011
Land
Sep. 29, 2012
Buildings and improvements
Dec. 31, 2011
Buildings and improvements
Sep. 29, 2012
Equipment (including computer software)
Dec. 31, 2011
Equipment (including computer software)
Sep. 29, 2012
Projects under construction
Dec. 31, 2011
Projects under construction
Sep. 29, 2012
Software development costs
Oct. 01, 2011
Software development costs
Sep. 29, 2012
Software development costs
Oct. 01, 2011
Software development costs
Property and equipment                            
Property plant and equipment, gross $ 24,725 $ 23,950 $ 1,140 $ 1,140 $ 3,425 $ 3,303 $ 20,047 $ 19,472 $ 113 $ 35        
Less accumulated depreciation and amortization (12,256) (11,415)                        
Property plant and equipment, net 12,469 12,535                        
Estimated useful life                         3 years  
Costs capitalized                     $ 30 $ 57 $ 115 $ 133