Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
REVENUES	$ 485,860	$ 376,088
OPERATING EXPENSES
Salaries, wages and benefits	161,762	142,016
Fuel	60,358	30,442
Maintenance, materials and repairs	35,709	42,007
Depreciation and amortization	82,071	71,051
Travel	24,199	18,404
Contracted ground and aviation services	18,331	14,803
Rent	6,663	5,868
Landing and ramp	4,578	3,109
Insurance	2,552	3,136
Other operating expenses	19,843	16,423
government grants continuing operations	0	(28,030)
Operating Expenses	416,066	319,229
OPERATING INCOME	69,794	56,859
OTHER INCOME (EXPENSE)
Interest income	9	19
Non-service component of retiree benefit costs	5,388	4,457
Non-service component of retiree benefit (costs) gains	(11,399)	(14,522)
Net gain (loss) on financial instruments	2,696	9,472
Other Nonoperating Income (Expense)	(4,709)	(1,757)
EARNINGS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	65,085	55,102
INCOME TAX EXPENSE		(12,812)
EARNINGS FROM CONTINUING OPERATIONS	49,796	42,290
EARNINGS (LOSS) FROM DISCONTINUED OPERATIONS, NET OF TAXES	0	0
NET EARNINGS	$ 49,796	$ 42,290
BASIC EARNINGS PER SHARE
Basic earnings per share from continuing operations (in dollars per share)	$ 0.67	$ 0.71
Discontinued operations (in dollars per share)	0	0
TOTAL BASIC EARNINGS PER SHARE (in dollars per share)	0.67	0.71
DILUTED EARNINGS PER SHARE
Diluted earnings per share from continuing operations (in dollars per share)	0.57	0.49
Discontinued operations (in dollars per share)	0	0
TOTAL DILUTED NET EARNINGS PER SHARE (in dollars per share)	$ 0.57	$ 0.49
WEIGHTED AVERAGE SHARES
Basic (in shares)	73,888	59,447
Diluted (in shares)	88,744	74,744