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WARRANTY COSTS AND OTHER CONTINGENCIES (Tables)
3 Months Ended
Mar. 31, 2019
WARRANTY COSTS AND OTHER CONTINGENCIES  
Schedule of analysis of warranty accruals
(in thousands)   2019     2018  
Balance at beginning of period   $ 5,607     $ 5,373  
Less: Payments made during the period     (950 )     (689 )
Add: Warranty provision for the period     1,044       981  
  Changes to warranty provision for prior periods     65       38  
Balance at March 31   $ 5,766     $ 5,703