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Note 8 - Derivative Instruments (Details) - Impact to Consolidated Statements of Operations of Derivatives (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 8 - Derivative Instruments (Details) - Impact to Consolidated Statements of Operations of Derivatives [Line Items]
Gain (loss) on derivatives	$ (884)us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings	$ (476)us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings	$ (46)us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings
Interest Rate Swap [Member] | ABL Credit Facility [Member]
Note 8 - Derivative Instruments (Details) - Impact to Consolidated Statements of Operations of Derivatives [Line Items]
Gain (loss) on derivatives	(472)us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings / us-gaap_CreditFacilityAxis = zeus_ABLCreditFacilityMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember	(309)us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings / us-gaap_CreditFacilityAxis = zeus_ABLCreditFacilityMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember
Interest Rate Swap [Member] | Chicago Tube and Iron Company Acquisition [Member]
Note 8 - Derivative Instruments (Details) - Impact to Consolidated Statements of Operations of Derivatives [Line Items]
Gain (loss) on derivatives	(100)us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings / us-gaap_BusinessAcquisitionAxis = zeus_ChicagoTubeAndIronCompanyAcquisitionMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember	(167)us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings / us-gaap_BusinessAcquisitionAxis = zeus_ChicagoTubeAndIronCompanyAcquisitionMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember	(46)us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings / us-gaap_BusinessAcquisitionAxis = zeus_ChicagoTubeAndIronCompanyAcquisitionMember / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_InterestRateSwapMember
Metals Swap [Member]
Note 8 - Derivative Instruments (Details) - Impact to Consolidated Statements of Operations of Derivatives [Line Items]
Gain (loss) on derivatives	622us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings / us-gaap_DerivativeInstrumentRiskAxis = zeus_MetalsSwapMember	(1,037)us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings / us-gaap_DerivativeInstrumentRiskAxis = zeus_MetalsSwapMember	(113)us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings / us-gaap_DerivativeInstrumentRiskAxis = zeus_MetalsSwapMember
Embedded Derivative Financial Instruments [Member]
Note 8 - Derivative Instruments (Details) - Impact to Consolidated Statements of Operations of Derivatives [Line Items]
Gain (loss) on derivatives	$ (934)us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_EmbeddedDerivativeFinancialInstrumentsMember	$ 1,037us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_EmbeddedDerivativeFinancialInstrumentsMember	$ 113us-gaap_GainLossOnFairValueHedgesRecognizedInEarnings / us-gaap_DerivativeInstrumentRiskAxis = us-gaap_EmbeddedDerivativeFinancialInstrumentsMember

X

- Definition

Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

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