Financial Instruments - Derivatives Gross Presentation on Condsolidated Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Derivative [Line Items]
Derivative, Collateral, Right to Reclaim Cash	$ 5,900
Fuel Derivatives [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability		(98)
Derivative Liability, Fair Value, Amount Offset Against Collateral		(98)
Derivative Liability, Fair Value, Net		0
Derivative Asset, Fair Value, Gross Asset	126
Derivative Asset, Fair Value, Amount Offset Against Collateral	0
Derivative Asset, Fair Value, Net	126
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 Liability, Fair Value, Gross Liability	(171)
Derivative Liability, Fair Value, Amount Offset Against Collateral	171
Derivative Asset, Fair Value, Gross Asset		237
Derivative Asset, Fair Value, Amount Offset Against Collateral		0
Derivative Asset, Fair Value, Net	0	237
Derivative, Fair Value, Gross Amount Not Offset Against Collateral, Net	0	0
Derivative, Collateral, Right to Reclaim Cash	0	0
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Net		26,424
Derivative Asset, Fair Value, Net	84,639
Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability		(21,290)
Derivative Liability, Fair Value, Amount Offset Against Collateral		0
Derivative Liability, Fair Value, Net		(21,290)
Derivative, Fair Value, Gross Amount Not Offset Against Collateral, Net		0
Derivative, Collateral, Right to Reclaim Cash		0
Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member]
Derivative [Line Items]
Derivative Liability, Fair Value, Gross Liability	(13,484)	(5,134)
Derivative Liability, Fair Value, Amount Offset Against Collateral	0	0
Derivative Liability, Fair Value, Net	(13,484)	(5,134)
Derivative Asset, Fair Value, Gross Asset	98,123
Derivative Asset, Fair Value, Amount Offset Against Collateral	0
Derivative Asset, Fair Value, Net	98,123
Derivative, Fair Value, Gross Amount Not Offset Against Collateral, Net	0	0
Derivative, Collateral, Right to Reclaim Cash	$ 0	$ 0