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SUPPLEMENTAL FINANCIAL INFORMATION (Details 4) - USD ($)
$ in Thousands
9 Months Ended
Oct. 03, 2015
Sep. 27, 2014
Accrued Warranty Obligations    
Balance at beginning of year $ 3,556 $ 3,285
Additions charged to cost of sales 2,278 2,134
Warranty claims (2,386) (2,487)
Balance at end of period $ 3,448 $ 2,932