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Note 4 - Goodwill and Intangible Assets (Details) - Goodwill by Reportable Segment (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Goodwill [Line Items] |  |
Balance as of | $ 16,951 us-gaap_Goodwill | $ 16,951 us-gaap_Goodwill
Flat Products [Member] |  |
Goodwill [Line Items] |  |
Balance as of | 500 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = zeus_FlatProductsMember | 500 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = zeus_FlatProductsMember
Tubular and Pipe Products [Member] |  |
Goodwill [Line Items] |  |
Balance as of | $ 16,451 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = zeus_TubularandPipeProductsMember | $ 16,451 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = zeus_TubularandPipeProductsMember

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_GoodwillLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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