Condensed Statements Of Operations (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating revenues:
Passenger	$ 308,573	$ 302,487	$ 582,039	$ 556,365
Non-ticket	244,848	196,850	464,737	380,959
Total operating revenues	553,421	499,337	1,046,776	937,324
Operating expenses:
Aircraft fuel	127,907	154,852	240,333	303,323
Salaries, wages and benefits	97,037	77,440	186,094	153,689
Aircraft rent	53,127	48,222	105,915	94,609
Landing fees and other rents	33,364	25,831	63,910	49,847
Distribution	22,349	20,159	42,846	38,728
Maintenance, materials and repairs	21,271	19,205	40,431	36,819
Depreciation and amortization	17,139	11,344	32,002	22,465
Other operating	58,173	36,408	101,920	71,856
Loss on disposal of assets	415	715	1,010	865
Special charges	324	17	749	26
Total operating expenses	431,106	394,193	815,210	772,227
Operating income	122,315	105,144	231,566	165,097
Other (income) expense:
Interest expense	4,419	103	7,231	210
Capitalized interest	(2,829)	(103)	(5,362)	(210)
Interest income	(177)	(83)	(311)	(151)
Other expense	44	1,439	116	1,476
Total other (income) expense	1,457	1,356	1,674	1,325
Income before income taxes	120,858	103,788	229,892	163,772
Provision for income taxes	44,154	38,939	84,186	61,217
Net income	$ 76,704	$ 64,849	$ 145,706	$ 102,555
Basic earnings per share (in dollars per share)	$ 1.06	$ 0.89	$ 2.00	$ 1.41
Diluted earnings per share (in dollars per share)	$ 1.05	$ 0.88	$ 1.99	$ 1.40