Condensed Statements Of Operations (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating revenues:
Passenger	$ 253,878	$ 218,897
Non-ticket	184,109	151,540
Total operating revenues	437,987	370,437
Operating expenses:
Aircraft fuel	148,471	131,666
Salaries, wages and benefits	76,249	61,497
Aircraft rent	46,387	41,072
Landing fees and other rents	24,016	18,056
Distribution	18,569	15,681
Maintenance, materials and repairs	17,614	11,780
Depreciation and amortization	11,121	6,324
Other operating	35,448	34,499
Loss on disposal of assets	150	170
Special charges (credits)	9	23
Total operating expenses	378,034	320,768
Operating income	59,953	49,669
Other (income) expense:
Interest expense	107	9
Capitalized interest	(107)	(9)
Interest income	(68)	(116)
Other expense	37	101
Total other (income) expense	(31)	(15)
Income before income taxes	59,984	49,684
Provision for income taxes	22,278	19,130
Net income	$ 37,706	$ 30,554
Basic earnings per share	$ 0.52	$ 0.42
Diluted earnings per share	$ 0.51	$ 0.42