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WARRANTY LIABILITIES (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 29, 2018
Sep. 30, 2017
Warranty liability activity [Roll Forward]    
Beginning balance $ 19,405 $ 15,421
Settlements in cash or kind (11,963) (11,608)
Warranties issued and adjustments to preexisting warranties 13,837 14,984
Ending balance $ 21,279 $ 18,797