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WARRANTY COSTS AND OTHER CONTINGENCIES (Tables)
9 Months Ended
Sep. 30, 2018
WARRANTY COSTS AND OTHER CONTINGENCIES  
Schedule of analysis of warranty accruals
(in thousands)   2018     2017  
Balance at beginning of period   $ 5,373     $ 4,629  
Less: Payments made during the period     (3,016 )     (2,013 )
Add: Warranty provision for the period     3,026       2,561  
  Changes to warranty provision for prior periods     56       60  
Balance at September 30   $ 5,439     $ 5,237