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WARRANTY LIABILITIES (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Warranty liability activity [Roll Forward]    
Beginning balance $ 15,421 $ 13,669
Settlements in cash or kind (11,608) (7,338)
Warranties issued and adjustments to preexisting warranties 14,984 8,604
Ending balance $ 18,797 $ 14,935