CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
OPERATING REVENUES:
Passenger	$ 744,390	$ 742,498
Ground handling and other	17,685	17,900
Total operating revenues	762,075	760,398
OPERATING EXPENSES:
Salaries, wages and benefits	305,557	302,845
Aircraft maintenance, materials and repairs	138,859	158,257
Aircraft rentals	67,124	70,412
Depreciation and amortization	67,801	65,691
Aircraft fuel	25,332	27,300
Ground handling services	20,984	23,973
Other, net	74,609	77,845
Total operating expenses	700,266	726,323
OPERATING INCOME	61,809	34,075
OTHER INCOME (EXPENSE):
Interest income	430	640
Interest expense	(17,725)	(18,465)
Total other expense, net	(17,295)	(17,825)
INCOME BEFORE INCOME TAXES	44,514	16,250
PROVISION FOR INCOME TAXES	17,422	6,630
NET INCOME	$ 27,092	$ 9,620
BASIC EARNINGS PER SHARE (in dollars per share)	$ 0.53	$ 0.19
DILUTED EARNINGS PER SHARE (in dollars per share)	$ 0.52	$ 0.18
Weighted average common shares:
Basic (in shares)	51,218	51,457
Diluted (in shares)	52,014	52,392
COMPREHENSIVE INCOME:
Net income	$ 27,092	$ 9,620
Net unrealized appreciation on marketable securities, net of taxes	15	301
TOTAL COMPREHENSIVE INCOME	$ 27,107	$ 9,921