Quarterly report pursuant to Section 13 or 15(d)

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

v2.4.0.8
Financial Instruments - Derivative Gross Presentation on Consolidated Balance Sheets (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Fuel Derivatives [Member]
   
Derivative [Line Items]    
Derivative Liability, Fair Value, Amount Offset Against Collateral $ 0 $ 0
Derivative Asset, Fair Value, Gross Asset 19 27
Derivative Asset, Fair Value, Net 19 27
Derivative, Fair Value, Gross Amount Not Offset Against Collateral, Net 0 0
Derivative, Collateral, Right to Reclaim Cash 0 0
LNG Inventory Derivatives [Member]
   
Derivative [Line Items]    
Derivative Asset, Fair Value, Gross Asset 35 (161)
Derivative Asset, Fair Value, Amount Offset Against Collateral 7 (161)
Derivative Asset, Fair Value, Net 28 0
Derivative, Fair Value, Gross Amount Not Offset Against Collateral, Net 0 0
Derivative, Collateral, Right to Reclaim Cash 0 0
Interest Rate Contract [Member] | Not Designated as Hedging Instrument [Member]
   
Derivative [Line Items]    
Derivative Liability, Fair Value, Gross Liability (19,544) (13,484)
Derivative Liability, Fair Value, Amount Offset Against Collateral 0 0
Derivative Liability, Fair Value, Net (19,544) (13,484)
Derivative Asset, Fair Value, Gross Asset 71,170 98,123
Derivative Asset, Fair Value, Amount Offset Against Collateral 0 0
Derivative Asset, Fair Value, Net 71,170 98,123
Derivative, Fair Value, Gross Amount Not Offset Against Collateral, Net 0 0
Derivative, Collateral, Right to Reclaim Cash 0 0
Interest Rate Contract [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
   
Derivative [Line Items]    
Derivative Asset, Fair Value, Net $ 51,626 $ 84,639