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Note 11 - Segment Information (Details) | 6 Months Ended
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Jun. 30, 2015
Note 11 - Segment Information (Details) [Line Items] |
Number of Reportable Segments | 3
Carbon Flat Products And Specialty Metals Flat Products [Member] |
Note 11 - Segment Information (Details) [Line Items] |
Number of Reportable Segments | 2

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
- References No definition available. + Details
Name: | zeus_Note11SegmentInformationDetailsLineItems
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: |