Quarterly report pursuant to Section 13 or 15(d)

4. DERIVATIVES (Details)

v2.4.1.9
4. DERIVATIVES (Details) (Commodity contracts [Member], Non Designated Derivative Instruments [Member], Cost of goods sold [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Commodity contracts [Member] | Non Designated Derivative Instruments [Member] | Cost of goods sold [Member]
   
Derivative Instruments, Gain (Loss) [Line Items]    
Realized Gains (Losses) $ (115)us-gaap_UnrealizedGainLossOnDerivatives
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
$ 84us-gaap_UnrealizedGainLossOnDerivatives
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
Unrealized Gains (Losses) $ (74)us-gaap_UnrealizedGainLossOnCommodityContracts
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
$ (14)us-gaap_UnrealizedGainLossOnCommodityContracts
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_CommodityContractMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember