Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
REVENUES	$ 376,088	$ 389,277
OPERATING EXPENSES
Salaries, wages and benefits	142,016	125,531
Fuel	30,442	43,799
Maintenance, materials and repairs	42,007	41,677
Depreciation and amortization	71,051	69,342
Travel	18,404	21,657
Contracted ground and aviation services	14,803	14,349
Rent	5,868	3,486
Landing and ramp	3,109	2,745
Insurance	3,136	1,668
Other operating expenses	16,423	15,216
government grants continuing operations	(28,030)	0
Operating Expenses	319,229	339,470
OPERATING INCOME	56,859	49,807
OTHER INCOME (EXPENSE)
Interest income	19	112
Non-service component of retiree benefit costs	4,457	2,898
Non-service component of retiree benefit gains	(14,522)	(16,323)
Net gain on financial instruments	9,472	107,044
Other Nonoperating Income (Expense)	(1,757)	90,967
EARNINGS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	55,102	140,774
INCOME TAX EXPENSE		(7,041)
EARNINGS FROM CONTINUING OPERATIONS	42,290	133,733
EARNINGS (LOSS) FROM DISCONTINUED OPERATIONS, NET OF TAXES	0	3,772
NET EARNINGS	$ 42,290	$ 137,505
BASIC EARNINGS PER SHARE
Basic earnings per share from continuing operations (in dollars per share)	$ 0.71	$ 2.27
Discontinued operations (in dollars per share)	0	0.06
TOTAL BASIC EARNINGS PER SHARE (in dollars per share)	0.71	2.33
DILUTED EARNINGS PER SHARE
Diluted earnings per share from continuing operations (in dollars per share)	0.49	0.84
Discontinued operations (in dollars per share)	$ 0	$ 0.06
WEIGHTED AVERAGE SHARES
Basic (in shares)	59,447	59,040
Diluted (in shares)	74,744	67,947