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Note 10 - Accumulated Other Comprehensive Loss (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Jun. 30, 2013
Jun. 30, 2012
Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | ABL Credit Facility [Member]      
Note 10 - Accumulated Other Comprehensive Loss (Details) [Line Items]      
Long-term Line of Credit $ 40,100,000us-gaap_LineOfCredit
/ us-gaap_DebtInstrumentAxis
= zeus_TermLoanMember
/ us-gaap_LineOfCreditFacilityAxis
= zeus_ABLCreditFacilityMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
$ 53,200,000us-gaap_LineOfCredit
/ us-gaap_DebtInstrumentAxis
= zeus_TermLoanMember
/ us-gaap_LineOfCreditFacilityAxis
= zeus_ABLCreditFacilityMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
$ 53,200,000us-gaap_LineOfCredit
/ us-gaap_DebtInstrumentAxis
= zeus_TermLoanMember
/ us-gaap_LineOfCreditFacilityAxis
= zeus_ABLCreditFacilityMember
/ us-gaap_VariableRateAxis
= us-gaap_LondonInterbankOfferedRateLIBORMember
Interest Rate Swap [Member]      
Note 10 - Accumulated Other Comprehensive Loss (Details) [Line Items]      
Long-term Line of Credit 40,100,000us-gaap_LineOfCredit
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
   
Fixed Rate Interest Hedge, Notional Monthly Decrease $ 729,000zeus_FixedRateInterestHedgeNotionalMonthlyDecrease
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember