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Commitments and Contingencies (Details) (USD $)
In Thousands, unless otherwise specified
0 Months Ended 3 Months Ended 9 Months Ended
Sep. 25, 1996
sites
Sep. 28, 2012
Sep. 30, 2011
Sep. 28, 2012
Sep. 30, 2011
Commitments and Contingencies Disclosure [Abstract]          
Number of National Priorities List sites for which the Company is indemnified for substantially all costs related to specifically identified environmental matters 11        
Number of National Priorities List sites for which the Company is indemnified for certain potential costs related to specifically identified environmental matters 9        
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]          
Balance, beginning of period   $ 5,272 $ 5,746 $ 5,050 $ 5,561
Payments made or service provided   (596) (1,296) (2,008) (3,248)
Warranty expense   718 1,207 2,386 3,152
Foreign currency translation   47 (217) 13 (25)
Balance, end of period   $ 5,441 $ 5,440 $ 5,441 $ 5,440