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PRODUCT WARRANTY COSTS (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Changes in the carrying amount of product warranty accruals    
Balance at beginning of year $ 15,398 $ 15,180
Accruals for warranties 14,567 9,063
Settlements (11,101) (9,051)
Foreign currency translation (414) (275)
Balance at end of year $ 18,450 $ 14,917