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PRODUCT WARRANTY COSTS (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Changes in the carrying amount of product warranty accruals    
Balance at beginning of year $ 19,469 $ 15,579
Accruals for warranties 3,035 2,979
Settlements (3,063) (3,209)
Foreign currency translation 147 (271)
Balance at end of year $ 19,588 $ 15,078