Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
REVENUES	$ 204,919	$ 254,101	$ 611,566	$ 745,229
OPERATING EXPENSES
Salaries, wages and benefits	71,341	61,177	216,173	199,496
Fuel	5,981	34,035	17,682	101,134
Maintenance, materials and repairs	33,469	33,100	107,152	100,970
Depreciation and amortization	43,201	37,605	124,825	111,828
Travel	6,903	6,357	20,823	20,543
Contracted ground and aviation services	2,636	40,445	7,464	93,283
Rent	3,274	3,052	10,264	10,091
Landing and ramp	1,211	4,682	3,670	14,338
Insurance	1,696	1,234	4,473	3,451
Other operating expenses	8,380	7,962	20,672	24,588
Operating Expenses	178,092	229,649	533,198	679,722
OPERATING INCOME	26,827	24,452	78,368	65,507
OTHER INCOME (EXPENSE)
Interest income	67	37	144	85
Non-service component of retiree benefit costs	2,045	(5,529)	6,135	(5,883)
Non-service component of retiree benefit costs	(5,608)	(4,351)	(16,336)	(11,658)
Net gain (loss) on financial instruments	17,895	(34,433)	28,707	(100,213)
Other Nonoperating Income (Expense)	11,752	(45,221)	11,050	(118,614)
EARNINGS (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	38,579	(20,769)	89,418	(53,107)
INCOME TAX EXPENSE	(5,646)	(7,460)	16,339	19,244
EARNINGS (LOSS) FROM CONTINUING OPERATIONS	32,933	(28,229)	73,079	(72,351)
EARNINGS (LOSS) FROM DISCONTINUED OPERATIONS, NET OF TAXES	170	(4,655)	536	(4,271)
NET EARNINGS (LOSS)	$ 33,103	$ (32,884)	$ 73,615	$ (76,622)
BASIC EARNINGS (LOSS) PER SHARE
Basic earnings per share from continuing operations (in dollars per share)	$ 0.56	$ (0.48)	$ 1.24	$ (1.23)
Discontinued operations (in dollars per share)	0.00	(0.08)	0.01	(0.07)
TOTAL BASIC EARNINGS PER SHARE (in dollars per share)	0.56	(0.56)	1.25	(1.30)
DILUTED EARNINGS (LOSS) PER SHARE
Diluted earnings per share from continuing operations (in dollars per share)	0.24	(0.48)	0.71	(1.23)
Discontinued operations (in dollars per share)	0.00	(0.08)	0.01	(0.07)
TOTAL DILUTED NET EARNINGS PER SHARE (in dollars per share)	$ 0.24	$ (0.56)	$ 0.72	$ (1.30)
WEIGHTED AVERAGE SHARES
Basic (in shares)	58,739	58,733	58,773	58,965
Diluted (in shares)	68,323	58,733	68,629	58,965