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PRODUCT WARRANTY COSTS (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Changes in the carrying amount of product warranty accruals    
Balance at beginning of year $ 15,398us-gaap_ProductWarrantyAccrual $ 15,180us-gaap_ProductWarrantyAccrual
Accruals for warranties 2,979us-gaap_ProductWarrantyAccrualWarrantiesIssued 3,198us-gaap_ProductWarrantyAccrualWarrantiesIssued
Settlements (3,189)us-gaap_ProductWarrantyAccrualPayments (2,904)us-gaap_ProductWarrantyAccrualPayments
Foreign currency translation (271)us-gaap_ProductWarrantyAccrualCurrencyTranslationIncreaseDecrease (44)us-gaap_ProductWarrantyAccrualCurrencyTranslationIncreaseDecrease
Balance at end of year $ 14,917us-gaap_ProductWarrantyAccrual $ 15,430us-gaap_ProductWarrantyAccrual