Condensed Statements Of Operations (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Operating revenues:
Passenger	$ 279,499	$ 202,181	$ 739,515	$ 594,071
Non-ticket	177,126	140,136	494,886	396,049
Total operating revenues	456,625	342,317	1,234,401	990,120
Operating expenses:
Aircraft fuel	144,986	122,016	411,903	350,974
Salaries, wages and benefits	66,805	54,413	192,758	160,556
Aircraft rent	42,134	37,536	125,121	106,469
Landing fees and other rents	22,106	19,060	61,508	51,240
Distribution	17,916	14,620	50,874	43,559
Maintenance, materials and repairs	16,908	14,211	43,890	37,254
Depreciation and amortization	8,475	3,815	22,403	10,012
Other operating	38,884	35,253	110,799	95,862
Loss on disposal of assets	165	0	426	482
Special charges (credits)	442	(8,288)	488	(8,345)
Total operating expenses	358,821	292,636	1,020,170	848,063
Operating income	97,804	49,681	214,231	142,057
Other (income) expense:
Interest expense	36	10	140	1,334
Capitalized interest	(36)	(10)	(140)	(1,334)
Interest income	(87)	(171)	(308)	(766)
Other expense	115	109	252	236
Total other (income) expense	28	(62)	(56)	(530)
Income before income taxes	97,776	49,743	214,287	142,587
Provision for income taxes	36,673	18,859	80,562	53,693
Net income	$ 61,103	$ 30,884	$ 133,725	$ 88,894
Basic earnings per share	$ 0.84	$ 0.43	$ 1.84	$ 1.23
Diluted earnings per share	$ 0.84	$ 0.43	$ 1.83	$ 1.22