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Long-term Debt Narrative (Details) (USD $)
12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jul. 03, 2013
Debt Instrument [Line Items]        
Long-term debt $ 79,285,000us-gaap_LongTermDebt      
Interest expense 3,177,000us-gaap_InterestExpense 1,725,000us-gaap_InterestExpense 417,000us-gaap_InterestExpense  
Loss on extinguishment of debt 0us-gaap_GainsLossesOnExtinguishmentOfDebt 463,000us-gaap_GainsLossesOnExtinguishmentOfDebt 0us-gaap_GainsLossesOnExtinguishmentOfDebt  
Steel Energy Ltd        
Debt Instrument [Line Items]        
Long-term debt 79,300,000us-gaap_LongTermDebt
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Proceeds from dividends received       80,000,000us-gaap_ProceedsFromDividendsReceived
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Energy Credit Agreement | Long-term Debt | Steel Energy Ltd        
Debt Instrument [Line Items]        
Long-term debt       80,000,000.0us-gaap_LongTermDebt
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Energy Credit Agreement | Term Loan | Steel Energy Ltd        
Debt Instrument [Line Items]        
Long-term debt       70,000,000.0us-gaap_LongTermDebt
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Energy Credit Agreement | Line of Credit | Revolving Credit Facility | Steel Energy Ltd        
Debt Instrument [Line Items]        
Maximum borrowing capacity       10,000,000.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
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= us-gaap_LineOfCreditMember
Borrowing base of eligible accounts receivable (as a percent)       85.00%sxcl_LineofCreditFacilityBorrowingBaseofEligibleAccountsReceivable
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Amended Credit Agreement | Steel Energy Ltd        
Debt Instrument [Line Items]        
Effective interest rate (as a percent) 2.80%us-gaap_DebtInstrumentInterestRateEffectivePercentage
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Interest expense 3,100,000us-gaap_InterestExpense
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1,400,000us-gaap_InterestExpense
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Amended Credit Agreement | Steel Energy Ltd | Base Rate        
Debt Instrument [Line Items]        
Description of variable rate basis Base Rate      
Amended Credit Agreement | Steel Energy Ltd | LIBOR        
Debt Instrument [Line Items]        
Description of variable rate basis LIBOR      
Basis spread on variable rate (as a percent) 1.00%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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Amended Credit Agreement | Steel Energy Ltd | Federal Funds Rate        
Debt Instrument [Line Items]        
Description of variable rate basis Federal Funds Rate      
Basis spread on variable rate (as a percent) 0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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Amended Credit Agreement | Minimum | Steel Energy Ltd | Base Rate        
Debt Instrument [Line Items]        
Basis spread on variable rate (as a percent) 1.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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Amended Credit Agreement | Minimum | Steel Energy Ltd | LIBOR        
Debt Instrument [Line Items]        
Basis spread on variable rate (as a percent) 2.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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Amended Credit Agreement | Maximum | Steel Energy Ltd | Base Rate        
Debt Instrument [Line Items]        
Basis spread on variable rate (as a percent) 2.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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Amended Credit Agreement | Maximum | Steel Energy Ltd | LIBOR        
Debt Instrument [Line Items]        
Basis spread on variable rate (as a percent) 3.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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= us-gaap_LondonInterbankOfferedRateLIBORMember
     
Amended Credit Agreement | Sun Well | Steel Energy Ltd        
Debt Instrument [Line Items]        
Ownership interest (as a percent) 100.00%sxcl_DebInstrumentCovenantOwnershipPercentageInterest
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Amended Credit Agreement | Steel Energy Ltd | Steel Partners        
Debt Instrument [Line Items]        
Ownership interest (as a percent) 35.00%sxcl_DebInstrumentCovenantOwnershipPercentageInterest
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Amended Credit Agreement | Revolving Credit Facility | Minimum | Steel Energy Ltd        
Debt Instrument [Line Items]        
Commitment fee (as a percent) 0.375%us-gaap_LineOfCreditFacilityCommitmentFeePercentage
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= us-gaap_MinimumMember
     
Amended Credit Agreement | Revolving Credit Facility | Maximum | Steel Energy Ltd        
Debt Instrument [Line Items]        
Commitment fee (as a percent) 0.50%us-gaap_LineOfCreditFacilityCommitmentFeePercentage
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Amended Credit Agreement | Quarterly periods through June 15, 2015 | Steel Energy Ltd        
Debt Instrument [Line Items]        
Leverage ratio 3.00sxcl_DebtInstrumentCovenantLeverageRatioMaximum
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Amended Credit Agreement | Quarterly periods through June 30, 2017 | Steel Energy Ltd        
Debt Instrument [Line Items]        
Leverage ratio 2.75sxcl_DebtInstrumentCovenantLeverageRatioMaximum
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Amended Credit Agreement | Quarterly periods after June 20, 2017 | Steel Energy Ltd        
Debt Instrument [Line Items]        
Leverage ratio 2.5sxcl_DebtInstrumentCovenantLeverageRatioMaximum
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Amended Credit Agreement | Quarterly periods through December 31, 2016 | Steel Energy Ltd        
Debt Instrument [Line Items]        
Fixed charge coverage ratio 1.15sxcl_DebtInstrumentCovenantFixedChargeCoverageRatioMinimum
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Amended Credit Agreement | Quarterly periods after December 31, 2016 | Steel Energy Ltd        
Debt Instrument [Line Items]        
Fixed charge coverage ratio 1.25sxcl_DebtInstrumentCovenantFixedChargeCoverageRatioMinimum
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Amended Credit Agreement | Long-term Debt | Steel Energy Ltd        
Debt Instrument [Line Items]        
Long-term debt   25,000,000.0us-gaap_LongTermDebt
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Unamortized debt issuance expense 1,400,000us-gaap_UnamortizedDebtIssuanceExpense
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Quarterly installments 3,300,000sxcl_LongtermDebtQuarterlyMaturities
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Sun Well Credit Agreement | Sun Well        
Debt Instrument [Line Items]        
Interest expense 300,000us-gaap_InterestExpense
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400,000us-gaap_InterestExpense
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Loss on extinguishment of debt 500,000us-gaap_GainsLossesOnExtinguishmentOfDebt
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Sun Well Credit Agreement | Term Loan | Sun Well        
Debt Instrument [Line Items]        
Long-term debt 20,000,000.0us-gaap_LongTermDebt
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Sun Well Credit Agreement | Line of Credit | Revolving Credit Facility | Sun Well        
Debt Instrument [Line Items]        
Maximum borrowing capacity $ 5,000,000.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
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