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Commitments and Contingencies (Product Warranty Rollforward) (Details 1) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 29, 2013
Movement in Standard Product Warranty Accrual [Roll Forward]  
Standard Product Warranty Accrual, Beginning Balance $ 2,626
Standard Product Warranty Accrual, Warranties Issued (481)
Standard Product Warranty Accrual, Payments (24)
Standard Product Warranty Accrual, Currency Translation, Increase (Decrease) 0
Standard Product Warranty Accrual, Ending Balance $ 2,121