Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
REVENUES	$ 348,183	$ 203,040
OPERATING EXPENSES
Salaries, wages and benefits	99,341	70,783
Fuel	34,750	5,788
Maintenance, materials and repairs	44,738	36,866
Depreciation and amortization	62,637	40,004
Travel	20,098	6,632
Contracted ground and aviation services	15,598	2,384
Rent	3,753	3,230
Landing and ramp	3,048	1,148
Insurance	1,911	1,357
Transaction fees	373	0
Other operating expenses	15,408	7,205
Operating Expenses	301,655	175,397
OPERATING INCOME	46,528	27,643
OTHER INCOME (EXPENSE)
Interest income	96	23
Non-service component of retiree benefit costs	(2,351)	2,045
Non-service component of retiree benefit (costs) credits	(17,390)	(5,362)
Net gain (loss) on financial instruments	4,500	(885)
Other Nonoperating Income (Expense)	(18,961)	(6,715)
EARNINGS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	27,567	20,928
INCOME TAX EXPENSE		(5,246)
EARNINGS FROM CONTINUING OPERATIONS	22,634	15,682
EARNINGS FROM DISCONTINUED OPERATIONS, NET OF TAXES	31	196
NET EARNINGS	$ 22,665	$ 15,878
BASIC EARNINGS PER SHARE
Basic earnings per share from continuing operations (in dollars per share)	$ 0.38	$ 0.27
Discontinued operations (in dollars per share)	0.01	0.00
TOTAL BASIC EARNINGS PER SHARE (in dollars per share)	0.39	0.27
DILUTED EARNINGS PER SHARE
Diluted earnings per share from continuing operations (in dollars per share)	0.25	0.26
Discontinued operations (in dollars per share)	0.00	0.01
TOTAL DILUTED NET EARNINGS PER SHARE (in dollars per share)	$ 0.25	$ 0.27
WEIGHTED AVERAGE SHARES
Basic (in shares)	58,838	58,840
Diluted (in shares)	60,437	59,558