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WARRANTY COSTS AND OTHER CONTINGENCIES (Tables)
9 Months Ended
Sep. 30, 2017
WARRANTY COSTS AND OTHER CONTINGENCIES  
Schedule of analysis of warranty accruals
(in thousands)   2017     2016  
Balance at beginning of period   $ 4,629     $ 3,405  
Less: Payments made during the period     (2,013 )     (2,184 )
Add: Warranty provision for the period     2,561       2,357  
  Changes to warranty provision for prior periods     60       299  
Balance at September 30   $ 5,237     $ 3,877