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WARRANTY COSTS AND OTHER CONTINGENCIES (Tables)
3 Months Ended
Mar. 31, 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     (608 )     (774 )
Add:  Warranty provision for the period     872       679  
Changes to warranty provision for prior periods     51       (137 )
Balance at March 31   $ 4,944     $ 3,173