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WARRANTY LIABILITIES (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Warranty liability activity [Roll Forward]    
Beginning balance $ 19,405 $ 15,421
Settlements in cash or kind (3,008) (1,721)
Warranties issued and adjustments to preexisting warranties 3,777 1,791
Ending balance $ 20,174 $ 15,491