Condensed Statements Of Operations (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Operating revenues:
Passenger	$ 273,466	$ 253,878
Non-ticket	219,889	184,109
Total operating revenues	493,355	437,987
Operating expenses:
Aircraft fuel	112,426	148,471
Salaries, wages and benefits	89,057	76,249
Aircraft rent	52,788	46,387
Landing fees and other rents	30,546	24,016
Distribution	20,497	18,569
Maintenance, materials and repairs	19,160	17,614
Depreciation and amortization	14,863	11,121
Other operating	43,747	35,448
Loss on disposal of assets	595	150
Special charges	425	9
Total operating expenses	384,104	378,034
Operating income	109,251	59,953
Other (income) expense:
Interest expense	2,812	107
Capitalized interest	(2,533)	(107)
Interest income	(134)	(68)
Other expense	72	37
Total other (income) expense	217	(31)
Income before income taxes	109,034	59,984
Provision for income taxes	40,032	22,278
Net income	$ 69,002	$ 37,706
Basic earnings per share (in dollars per share)	$ 0.94	$ 0.52
Diluted earnings per share (in dollars per share)	$ 0.94	$ 0.51