Condensed Statements Of Operations (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Operating revenues:
Passenger	$ 202,181	$ 186,682	$ 594,071	$ 520,380
Non-ticket	140,136	102,032	396,049	276,887
Total operating revenue	342,317	288,714	990,120	797,267
Operating expenses:
Aircraft fuel	122,016	104,985	350,974	293,219
Salaries, wages and benefits	54,413	45,148	160,556	133,514
Aircraft rent	37,536	29,220	106,469	86,009
Landing fees and other rents	19,060	13,966	51,240	38,628
Distribution	14,620	14,177	43,559	39,146
Maintenance, materials and repairs	14,211	11,010	37,254	25,903
Depreciation and amortization	3,815	2,059	10,012	5,296
Other operating	35,253	23,571	95,862	66,775
Loss on disposal of assets	0	4	482	39
Special charges (credits)	(8,288)	18	(8,345)	2,379
Total operating expenses	292,636	244,158	848,063	690,908
Operating income	49,681	44,556	142,057	106,359
Other (income) expense:
Interest expense	10	444	1,344	24,408
Capitalized interest	(10)	(444)	(1,344)	(2,519)
Interest income	(171)	(99)	(766)	(256)
Other expense	109	42	236	165
Total other (income) expense	(62)	(57)	(530)	21,798
Income before income taxes	49,743	44,613	142,587	84,561
Provision for income taxes	18,859	16,956	53,693	32,104
Net income	$ 30,884	$ 27,657	$ 88,894	$ 52,457
Net income per share, basic	$ 0.43	$ 0.38	$ 1.23	$ 1.12
Net income per share, diluted	$ 0.43	$ 0.38	$ 1.22	$ 1.11