| 
           Financial Instruments - Fair Value of Derivative Assets and Liabilities (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        
           Mar. 31, 2013 
         | 
        
           Dec. 31, 2012 
         | 
      
|---|---|---|
| 
           LNG Inventory Derivatives [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| Derivative Asset, Fair Value, Gross Asset | $ 232 | |
| Derivative Liability, Fair Value, Gross Liability | (421) | |
| Derivative Liability, Fair Value, Net | 0 | |
| 
           LNG Inventory Derivatives [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| LNG Inventory Derivative assets | 0 | |
| Fuel Derivatives liability | 0 | |
| 
           LNG Inventory Derivatives [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| LNG Inventory Derivative assets | 0 | |
| Fuel Derivatives liability | 0 | |
| 
           LNG Inventory Derivatives [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| LNG Inventory Derivative assets | 232 | |
| Fuel Derivatives liability | (421) | |
| 
           LNG Inventory Derivatives [Member] | Prepaid Expenses And Other [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| LNG Inventory Derivative assets | 232 | |
| 
           LNG Inventory Derivatives [Member] | Prepaid Expenses And Other [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| LNG Inventory Derivative assets | 232 | |
| 
           LNG Inventory Derivatives [Member] | Other Current Liabilities [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| Fuel Derivatives liability | (421) | |
| 
           LNG Inventory Derivatives [Member] | Other Current Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| Fuel Derivatives liability | (421) | |
| 
           Fuel Derivatives [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| Derivative Asset, Fair Value, Gross Asset | 420 | |
| Derivative Liability, Fair Value, Gross Liability | (98) | |
| Derivative Liability, Fair Value, Net | 0 | |
| 
           Fuel Derivatives [Member] | Fair Value, Inputs, Level 2 [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| Derivative Asset, Fair Value, Gross Asset | 420 | |
| Derivative Liability, Fair Value, Gross Liability | (98) | |
| 
           Fuel Derivatives [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| LNG Inventory Derivative assets | 0 | |
| Fuel Derivatives liability | 0 | |
| 
           Fuel Derivatives [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| LNG Inventory Derivative assets | 0 | |
| Fuel Derivatives liability | 0 | |
| 
           Fuel Derivatives [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| LNG Inventory Derivative assets | 420 | |
| Fuel Derivatives liability | (98) | |
| 
           Interest Rate Contract [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| Derivative Liability, Fair Value, Net | 0 | 0 | 
| 
           Interest Rate Contract [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| Derivative Liability, Fair Value, Net | (26,424) | |
| 
           Interest Rate Contract [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| Derivative Liability, Fair Value, Net | 0 | 0 | 
| 
           Interest Rate Contract [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| Derivative Liability, Fair Value, Net | (26,424) | |
| 
           Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| Derivative Liability, Fair Value, Gross Liability | (23,055) | (5,134) | 
| Derivative Liability, Fair Value, Net | (23,055) | (5,134) | 
| 
           Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Fair Value, Inputs, Level 2 [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| Derivative Liability, Fair Value, Net | (23,055) | |
| 
           Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] | Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] 
         | 
        ||
| Derivatives, Fair Value [Line Items] | ||
| Derivative Liability, Fair Value, Net | $ (23,055) |