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WARRANTY LIABILITIES (Details) - USD ($)
$ in Thousands
6 Months Ended
Jul. 01, 2017
Jul. 02, 2016
Warranty liability activity [Roll Forward]    
Beginning balance $ 15,421 $ 13,669
Settlements in cash or kind (3,838) (4,795)
Warranties issued and adjustments to preexisting warranties 4,674 4,861
Ending balance $ 16,257 $ 13,735