Condensed Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
OPERATING REVENUES:
Fixed-fee service	$ 1,348.5	$ 1,276.1	$ 1,102.1
Passenger service	0	46.3	247.9
Other Revenue	26.9	24.1	27.4
Total operating revenues	1,375.4	1,346.5	1,377.4
OPERATING EXPENSES:
Wages and benefits	368.0	342.1	308.4
Aircraft fuel	22.4	44.9	161.4
Landing fees and airport rents	26.9	46.4	61.5
Aircraft and engine rent	126.0	122.6	110.7
Maintenance and repair	251.1	251.6	235.3
Insurance and taxes	19.9	25.1	24.7
Depreciation and amortization	173.0	150.7	160.0
Promotion and sales	0	2.3	12.8
Impairment and other charges	53.4	21.2	0
Other	149.2	148.6	134.1
Total operating expenses	1,189.9	1,155.5	1,208.9
OPERATING INCOME	185.5	191.0	168.5
OTHER INCOME (EXPENSE):
Interest expense	(119.7)	(112.2)	(117.6)
Fair value gain on restructuring asset	18.4	0	0
Other, net	1.0	2.5	0.2
Total other expense	(100.3)	(109.7)	(117.4)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	85.2	81.3	51.1
INCOME TAX EXPENSE	20.9	33.0	19.8
Income from Continuing Operations	64.3	48.3	31.3
Income (loss) from discontinued operations, net of tax	0	(21.6)	20.0
Net Income	$ 64.3	$ 26.7	$ 51.3
Income from Continuing Operations, Per Common Share - Basic	$ 1.29	$ 0.98	$ 0.65
Income from Continuing Operations, Per Common Share - Diluted	$ 1.24	$ 0.92	$ 0.63
NET INCOME PER COMMON SHARE - BASIC	$ 1.29	$ 0.54	$ 1.06
NET INCOME PER COMMON SHARE - DILUTED	$ 1.24	$ 0.52	$ 1.02