Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments Financial Instruments - Derivative Gross Presentation on Consolidated Balance Sheets (Details)

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Financial Instruments Financial Instruments - Derivative Gross Presentation on Consolidated Balance Sheets (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
LNG Inventory Derivatives [Member]
    
Derivative [Line Items]    
Derivative Asset, Gross Amounts Recognized $ 10  
Derivative Liability, Gross Amounts Recognized   (171)
Derivative Asset, Gross Amounts Offset in our Balance Sheets 0  
Derivative Liability, Gross Amounts Offset in our Balance Sheets   (171)
Net Amounts Presented in our Balance Sheets 10 0
Derivative Asset, Gross Amount Not Offset in our Balance Sheets - Derivative Instrument 0  
Derivative Liability, Gross Amount Not Offset in our Balance Sheets - Derivative Instrument   0
Gross Amount Not Offset in our Balance Sheets - Cash Collateral Received (Paid) 0 0
Derivative Asset, Net Amount 10  
Derivative Liability, Net Amount   0
Fuel Derivatives [Member]
    
Derivative [Line Items]    
Derivative Asset, Gross Amounts Recognized 97 126
Derivative Asset, Gross Amounts Offset in our Balance Sheets 0 0
Net Amounts Presented in our Balance Sheets 97 126
Derivative Asset, Gross Amount Not Offset in our Balance Sheets - Derivative Instrument 0 0
Gross Amount Not Offset in our Balance Sheets - Cash Collateral Received (Paid) 0 0
Derivative Asset, Net Amount 97 126
Term Gas Supply Derivatives [Member]
    
Derivative [Line Items]    
Derivative Asset, Gross Amounts Recognized 0  
Derivative Asset, Gross Amounts Offset in our Balance Sheets 0  
Net Amounts Presented in our Balance Sheets 0  
Derivative Asset, Gross Amount Not Offset in our Balance Sheets - Derivative Instrument 0  
Gross Amount Not Offset in our Balance Sheets - Cash Collateral Received (Paid) 0  
Derivative Asset, Net Amount 0  
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member]
    
Derivative [Line Items]    
Derivative Asset, Gross Amounts Recognized 20,236 98,123
Derivative Asset, Gross Amounts Offset in our Balance Sheets 0 0
Net Amounts Presented in our Balance Sheets 20,236 98,123
Derivative Asset, Gross Amount Not Offset in our Balance Sheets - Derivative Instrument 0 0
Gross Amount Not Offset in our Balance Sheets - Cash Collateral Received (Paid) 0 0
Derivative Asset, Net Amount 20,236 98,123
Interest Rate Contract 2 [Member] | Not Designated as Hedging Instrument [Member]
    
Derivative [Line Items]    
Derivative Liability, Gross Amounts Recognized (13,106) (13,484)
Derivative Liability, Gross Amounts Offset in our Balance Sheets 0 0
Net Amounts Presented in our Balance Sheets (13,106) (13,484)
Derivative Liability, Gross Amount Not Offset in our Balance Sheets - Derivative Instrument 0 0
Gross Amount Not Offset in our Balance Sheets - Cash Collateral Received (Paid) 0 0
Derivative Liability, Net Amount $ (13,106) $ (13,484)