CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
OPERATING REVENUES:
Passenger	$ 742,498	$ 755,639
Ground handling and other	17,900	16,747
Total operating revenues	760,398	772,386
OPERATING EXPENSES:
Salaries, wages and benefits	302,845	317,642
Aircraft maintenance, materials and repairs	158,257	178,262
Aircraft rentals	70,412	80,335
Depreciation and amortization	65,691	62,316
Aircraft fuel	27,300	47,225
Ground handling services	23,973	37,018
Other operating expenses, net	77,845	77,362
Total operating expenses	726,323	800,160
OPERATING INCOME (LOSS)	34,075	(27,774)
OTHER INCOME (EXPENSE):
Interest income	640	548
Interest expense	(18,465)	(15,676)
Other, net		(273)
Total other expense, net	(17,825)	(15,401)
INCOME (LOSS) BEFORE INCOME TAXES	16,250	(43,175)
PROVISION (BENEFIT) FOR INCOME TAXES	6,630	(20,288)
NET INCOME (LOSS)	9,620	(22,887)
BASIC EARNINGS (LOSS) PER SHARE (in dollars per share)	$ 0.19	$ (0.44)
DILUTED EARNINGS (LOSS) PER SHARE (in dollars per share)	$ 0.18	$ (0.44)
Weighted average common shares:
Basic (in shares)	51,457	51,467
Diluted (in shares)	52,392	51,467
Dividends declared per share (in dollars per share)	$ 0.04	$ 0.04
COMPREHENSIVE INCOME (LOSS):
Net Income (Loss)	9,620	(22,887)
Net unrealized appreciation marketable securities, net of tax	301	23
TOTAL COMPREHENSIVE INCOME (LOSS)	$ 9,921	$ (22,864)