Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
REVENUES	$ 389,277	$ 348,183
OPERATING EXPENSES
Salaries, wages and benefits	125,531	99,341
Fuel	43,799	34,950
Maintenance, materials and repairs	41,677	44,538
Depreciation and amortization	69,342	62,637
Travel	21,657	20,098
Contracted ground and aviation services	14,349	15,598
Rent	3,486	3,753
Landing and ramp	2,745	3,048
Insurance	1,668	1,911
Transaction fees	0	373
Other operating expenses	15,216	15,408
Operating Expenses	339,470	301,655
OPERATING INCOME	49,807	46,528
OTHER INCOME (EXPENSE)
Interest income	112	96
Non-service component of retiree benefit costs	2,898	(2,351)
Non-service component of retiree benefit gains (costs)	(16,323)	(17,390)
Net gain on financial instruments	107,044	4,500
Other Nonoperating Income (Expense)	90,967	(18,961)
EARNINGS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	140,774	27,567
INCOME TAX EXPENSE		(4,933)
EARNINGS FROM CONTINUING OPERATIONS	133,733	22,634
EARNINGS FROM DISCONTINUED OPERATIONS, NET OF TAXES	3,772	31
NET EARNINGS	$ 137,505	$ 22,665
BASIC EARNINGS PER SHARE
Basic earnings per share from continuing operations (in dollars per share)	$ 2.27	$ 0.38
Discontinued operations (in dollars per share)	0.06	0.01
TOTAL BASIC EARNINGS PER SHARE (in dollars per share)	2.33	0.39
DILUTED EARNINGS PER SHARE
Diluted earnings per share from continuing operations (in dollars per share)	0.84	0.25
Discontinued operations (in dollars per share)	0.06	0
TOTAL DILUTED NET EARNINGS PER SHARE (in dollars per share)	$ 0.90	$ 0.25
WEIGHTED AVERAGE SHARES
Basic (in shares)	59,040	58,838
Diluted (in shares)	67,947	60,437