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PRODUCT WARRANTY COSTS (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Changes in the carrying amount of product warranty accruals    
Balance at beginning of year $ 19,469 $ 15,579
Accruals for warranties 9,222 14,386
Settlements (8,529) (11,101)
Foreign currency translation 111 (414)
Balance at end of year $ 20,273 $ 18,450