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Note 1 - Basis of Presentation (Details) | 3 Months Ended
--- | ---
Mar. 31, 2015
Note 1 - Basis of Presentation (Details) [Line Items] |
Number of Reportable Segments | 3 us-gaap_NumberOfReportableSegments
Carbon Flat Products And Specialty Metals Flat Products [Member] |
Note 1 - Basis of Presentation (Details) [Line Items] |
Number of Reportable Segments | 2 us-gaap_NumberOfReportableSegments / us-gaap_StatementBusinessSegmentsAxis = zeus_CarbonFlatProductsAndSpecialtyMetalsFlatProductsMember

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | zeus_Note1BasisofPresentationDetailsLineItems
Namespace Prefix: | zeus_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=zeus_CarbonFlatProductsAndSpecialtyMetalsFlatProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |