Condensed Statements Of Operations (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating revenues:
Passenger	$ 299,762	$ 272,626
Non-ticket	291,984	265,517
Total operating revenues	591,746	538,143
Operating expenses:
Salaries, wages and benefits	127,138	116,410
Aircraft fuel	139,782	85,982
Aircraft rent	57,070	52,202
Landing fees and other rents	40,448	34,807
Depreciation and amortization	31,509	23,109
Maintenance, materials and repairs	26,312	20,940
Distribution	26,498	22,933
Special charges	4,776	16,202
Loss on disposal of assets	1,105	214
Other operating	77,703	64,045
Total operating expenses	532,341	436,844
Operating income	59,405	101,299
Other (income) expense:
Interest expense	12,473	8,060
Capitalized interest	(3,580)	(3,325)
Interest income	(1,313)	(1,566)
Other expense	3	70
Total other (income) expense	7,583	3,239
Income before income taxes	51,822	98,060
Provision for income taxes	19,887	36,140
Net income	$ 31,935	$ 61,920
Basic earnings per share (in dollars per share)	$ 0.46	$ 0.87
Diluted earnings per share (in dollars per share)	$ 0.46	$ 0.86