Condensed Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Operating revenues:
Passenger	$ 211,812	$ 180,418	$ 391,890	$ 333,698
Non-ticket	134,496	95,473	255,913	174,855
Total operating revenue	346,308	275,891	647,803	508,553
Operating expenses:
Aircraft fuel	120,233	107,322	228,958	188,234
Salaries, wages and benefits	53,489	45,173	106,143	88,366
Aircraft rent	36,060	29,081	68,933	56,789
Landing fees and other rents	17,066	13,007	32,180	24,662
Distribution	14,738	13,037	28,939	24,969
Maintenance, materials and repairs	13,558	7,480	23,972	15,538
Depreciation and amortization	3,327	1,691	6,197	3,237
Other operating	32,657	21,826	59,680	42,559
Loss on disposal of assets	33	35	482	35
Special charges	15	2,280	(57)	2,361
Total operating expenses	291,176	240,932	555,427	446,750
Operating income	55,132	34,959	92,376	61,803
Other (income) expense:
Interest expense	794	9,678	1,334	23,964
Capitalized interest	(794)	(1,039)	(1,334)	(2,076)
Interest income	(180)	(71)	(595)	(157)
Other expense	84	76	127	124
Total other (income) expense	(96)	8,644	(468)	21,855
Income before income taxes	55,228	26,315	92,844	39,948
Provision for income taxes	20,637	9,398	34,834	15,148
Net income	$ 34,591	$ 16,917	$ 58,010	$ 24,800
Net income per share, basic	$ 0.48	$ 0.41	$ 0.80	$ 0.73
Net income per share, diluted	$ 0.48	$ 0.41	$ 0.80	$ 0.72