Financial Instruments and Risk Management (Tables)

6 Months Ended

Jun. 30, 2016

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 six months ended June 30, 2016 and 2015:

	Three Months Ended June 30,					Six Months Ended June 30,
	2016		2015			2016		2015
	(in thousands)
Into-plane fuel cost	$	113,192	$	127,344		$	199,174	$	235,468
Realized losses (gains) related to fuel derivative contracts, net	—		4,232			—		6,839
Unrealized losses (gains) related to fuel derivative contracts, net	—		(3,669		)	—		(1,974		)
Aircraft fuel	$	113,192	$	127,907		$	199,174	$	240,333