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Warranty Liability Rollforward (Details) - USD ($)
$ in Thousands
6 Months Ended
Jul. 01, 2016
Jun. 26, 2015
Movement in Standard Product Warranty Accrual [Roll Forward]    
Warranty liability, beginning of period $ 37,407 $ 51,135
Accrued warranty expense 13,750 8,685
Changes in estimates related to pre-existing warranties 2,322 (2,696)
Cost of warranty service work performed (16,839) (12,641)
Foreign exchange translation effect 705 (2,013)
Warranty liability, end of period $ 37,345 $ 42,470