Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
REVENUES	$ 334,576	$ 203,607	$ 682,759	$ 406,647
OPERATING EXPENSES
Salaries, wages and benefits	97,850	74,049	197,191	144,832
Fuel	33,984	5,913	68,734	11,701
Maintenance, materials and repairs	39,651	36,817	84,389	73,683
Depreciation and amortization	63,266	41,620	125,903	81,624
Travel	20,937	7,288	41,035	13,920
Contracted ground and aviation services	14,531	2,444	30,129	4,828
Rent	3,984	3,760	7,737	6,990
Landing and ramp	2,391	1,311	5,439	2,459
Insurance	1,857	1,420	3,768	2,777
Transaction fees	0	0	373	0
Other operating expenses	18,643	5,087	34,051	12,292
Operating Expenses	297,094	179,709	598,749	355,106
OPERATING INCOME	37,482	23,898	84,010	51,541
OTHER INCOME (EXPENSE)
Interest income	81	54	177	77
Non-service component of retiree benefit costs	(2,351)	2,045	(4,702)	4,090
Non-service component of retiree benefit (costs) credits	(16,804)	(5,366)	34,194	10,728
Net gain (loss) on financial instruments	(35,886)	11,697	(31,386)	10,812
Loss from non-consolidated affiliate			9,814	4,953
Other Nonoperating Income (Expense)	(60,958)	6,013	(79,919)	(702)
EARNINGS (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	(23,476)	29,911	4,091	50,839
INCOME TAX EXPENSE		(5,447)	8,089	10,693
EARNINGS (LOSS) FROM CONTINUING OPERATIONS	(26,632)	24,464	(3,998)	40,146
EARNINGS FROM DISCONTINUED OPERATIONS, NET OF TAXES	31	170	62	366
NET EARNINGS (LOSS)	$ (26,601)	$ 24,634	$ (3,936)	$ 40,512
BASIC EARNINGS PER SHARE
Basic earnings per share from continuing operations (in dollars per share)	$ (0.45)	$ 0.42	$ (0.07)	$ 0.68
Discontinued operations (in dollars per share)	0	0	0	0.01
TOTAL BASIC EARNINGS PER SHARE (in dollars per share)	(0.45)	0.42	(0.07)	0.69
DILUTED EARNINGS PER SHARE
Diluted earnings per share from continuing operations (in dollars per share)	(0.45)	0.21	(0.07)	0.48
Discontinued operations (in dollars per share)	0	0	0	0
TOTAL DILUTED NET EARNINGS PER SHARE (in dollars per share)	$ (0.45)	$ 0.21	$ (0.07)	$ 0.48
WEIGHTED AVERAGE SHARES
Basic (in shares)	58,909	58,739	58,874	58,790
Diluted (in shares)	58,909	68,363	58,874	68,784