XML 34 R17.htm IDEA: XBRL DOCUMENT v2.4.0.6
Financial Instruments and Risk Management (Tables)
 3 Months Ended
Mar. 31, 2013
Investments, All Other Investments [Abstract]  
Components of aircraft fuel expense
The following table summarizes the components of aircraft fuel expense for the three months ended March 31, 2013 and 2012:
 
Three Months Ended March 31,
 
2013
 
2012
 
(in thousands)
Into-plane fuel cost
$
128,713

 
$
110,918

Settlement losses (gains)
(428
)
 
(2,451
)
Unrealized mark-to-market losses (gains)
3,381

 
258

Aircraft fuel
$
131,666

 
$
108,725