CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
OPERATING REVENUES:
Total operating revenues	$ 4,058,202	$ 3,527,920	$ 2,935,432
OPERATING EXPENSES:
Salaries, wages and benefits	1,559,356	1,463,932	1,322,615
Aircraft maintenance, materials and repairs	943,779	712,642	673,453
Depreciation and amortization	364,497	383,880	383,115
Airport-related expenses	121,589	85,836	72,640
Aircraft fuel	120,368	87,409	85,913
Other operating expenses	330,767	299,564	293,627
Total operating expenses	3,440,356	3,033,263	2,831,363
OPERATING INCOME	617,846	494,657	104,069
OTHER INCOME (EXPENSE):
Interest income	43,326	47,961	43,928
Interest expense	(104,445)	(114,340)	(130,930)
Other income, net	8,864	3,865	23,242
Total other expense, net	(52,255)	(62,514)	(63,760)
INCOME BEFORE INCOME TAXES	565,591	432,143	40,309
PROVISION FOR INCOME TAXES	137,257	109,181	5,967
NET INCOME	$ 428,334	$ 322,962	$ 34,342
BASIC EARNINGS PER SHARE (in dollars per share)	$ 10.62	$ 8.02	$ 0.78
DILUTED EARNINGS PER SHARE (in dollars per share)	$ 10.35	$ 7.77	$ 0.77
Weighted average common shares:
Basic (in shares)	40,314	40,262	43,940
Diluted (in shares)	41,403	41,547	44,599
COMPREHENSIVE INCOME:
Net income	$ 428,334	$ 322,962	$ 34,342
Net unrealized appreciation (depreciation) on marketable securities, net of taxes	110	(157)	4,127
TOTAL COMPREHENSIVE INCOME	428,444	322,805	38,469
Flying agreements
OPERATING REVENUES:
Total operating revenues	3,885,153	3,412,798	2,834,397
Lease, airport services and other
OPERATING REVENUES:
Total operating revenues	$ 173,049	$ 115,122	$ 101,035