Financial Instruments and Risk Management (Tables)

9 Months Ended

Sep. 30, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Components of aircraft fuel expense

The following table summarizes the components of aircraft fuel expense for the three and nine months ended September 30, 2015 and 2014:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015			2014
	(in thousands)
Into-plane fuel cost	$	114,081	$	171,138	$	349,549		$	473,994
Realized losses (gains) related to fuel derivative contracts, net	1,736		151		8,575			151
Unrealized losses (gains) related to fuel derivative contracts, net	82		295		(1,892		)	762
Aircraft fuel	$	115,899	$	171,584	$	356,232		$	474,907