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Note 7 - Debt (Details) - Debt (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Note 7 - Debt (Details) - Debt [Line Items]    
Asset-based revolving credit facility $ 244,090us-gaap_LongTermLineOfCredit $ 146,075us-gaap_LongTermLineOfCredit
Total debt 247,620us-gaap_DebtAndCapitalLeaseObligations 199,269us-gaap_DebtAndCapitalLeaseObligations
Less current amount (3,530)us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent (13,090)us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent
Total long-term debt 244,090us-gaap_LongTermDebtAndCapitalLeaseObligations 186,179us-gaap_LongTermDebtAndCapitalLeaseObligations
Term Loan [Member]    
Note 7 - Debt (Details) - Debt [Line Items]    
Debt   48,854us-gaap_LoansPayable
/ us-gaap_DebtInstrumentAxis
= zeus_TermLoanMember
Industrial Revenue Bond [Member]    
Note 7 - Debt (Details) - Debt [Line Items]    
Debt 3,530us-gaap_LoansPayable
/ us-gaap_DebtInstrumentAxis
= zeus_IndustrialRevenueBondMember
4,340us-gaap_LoansPayable
/ us-gaap_DebtInstrumentAxis
= zeus_IndustrialRevenueBondMember
Asset-Based Revolving Credit Facility Due June 30, 2019 [Member]    
Note 7 - Debt (Details) - Debt [Line Items]    
Asset-based revolving credit facility 244,090us-gaap_LongTermLineOfCredit
/ us-gaap_CreditFacilityAxis
= zeus_AssetBasedRevolvingCreditFacilityDueJune302019Member
 
Asset-Based Revolving Credit Facility Due June 30, 2016 [Member]    
Note 7 - Debt (Details) - Debt [Line Items]    
Asset-based revolving credit facility   $ 146,075us-gaap_LongTermLineOfCredit
/ us-gaap_CreditFacilityAxis
= zeus_AssetBasedRevolvingCreditFacilityDueJune302016Member