CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
OPERATING REVENUES:
Total operating revenues	$ 3,004,925	$ 2,713,491	$ 2,127,106
OPERATING EXPENSES:
Salaries, wages and benefits	1,211,551	986,664	826,109
Aircraft maintenance, materials and repairs	644,157	817,803	618,989
Depreciation and amortization	394,552	440,198	474,959
Aircraft fuel	108,456	107,057	61,739
Aircraft rentals	75,353	63,357	65,316
Airport-related expenses	71,549	104,690	93,886
Special items		84,592
Payroll support grant		(422,669)	(345,491)
Other operating expenses	318,145	255,932	222,797
Total operating expenses	2,823,763	2,437,624	2,018,304
OPERATING INCOME	181,162	275,867	108,802
OTHER INCOME (EXPENSE):
Interest income	17,605	1,114	5,879
Interest expense	(127,083)	(123,122)	(123,173)
Other income (expense), net	20,899	(3,249)	1,165
Total other expense, net	(88,579)	(125,257)	(116,129)
INCOME (LOSS) BEFORE INCOME TAXES	92,583	150,610	(7,327)
PROVISION FOR INCOME TAXES	19,630	38,700	1,188
NET INCOME (LOSS)	$ 72,953	$ 111,910	$ (8,515)
BASIC EARNINGS PER SHARE (in dollars per share)	$ 1.44	$ 2.22	$ (0.17)
DILUTED EARNINGS PER SHARE (in dollars per share)	$ 1.44	$ 2.20	$ (0.17)
Weighted average common shares:
Basic (in shares)	50,548	50,348	50,195
Diluted (in shares)	50,644	50,753	50,195
COMPREHENSIVE INCOME (LOSS):
Net income (loss)	$ 72,953	$ 111,910	$ (8,515)
Net unrealized depreciation on marketable securities, net of taxes	(3,802)
TOTAL COMPREHENSIVE INCOME (LOSS)	69,151	111,910	(8,515)
Flying agreements
OPERATING REVENUES:
Total operating revenues	2,899,837	2,615,076	2,060,801
Lease, airport services and other
OPERATING REVENUES:
Total operating revenues	$ 105,088	$ 98,415	$ 66,305