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Derivative And Financial Instruments (Tables)
6 Months Ended
Jun. 30, 2011
Derivative And Financial Instruments  
Effect of Cash Flow Hedges On Financial Statements
                                             

Asset Derivatives as of

    

Liability Derivatives as of

 

June 30, 2011

    

December 31, 2010

    

June 30, 2011

    

December 31, 2010

 

Balance Sheet Location

   Fair
Value
    

Balance Sheet Location

   Fair
Value
    

Balance Sheet Location

   Fair
Value
    

Balance Sheet Location

   Fair
Value
 
               

Fuel derivative contracts

   $ 364      

Fuel derivative contracts

   $ 269      

Accrued liabilities

   $ 2      

Accrued liabilities

   $ —     
Effect Of Derivative Instruments On Statements Of Operations