CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
OPERATING REVENUES:
Total operating revenues	$ 948,455	$ 803,614
OPERATING EXPENSES:
Salaries, wages and benefits	377,311	350,999
Aircraft maintenance, materials and repairs	209,100	145,415
Depreciation and amortization	89,446	95,870
Airport-related expenses	27,823	20,888
Aircraft fuel	24,488	21,164
Other operating expenses	80,910	69,772
Total operating expenses	809,078	704,108
OPERATING INCOME	139,377	99,506
OTHER INCOME (EXPENSE):
Interest income	10,086	11,626
Interest expense	(27,118)	(29,829)
Other expense, net	(1,627)	(1,128)
Total other expense, net	(18,659)	(19,331)
INCOME BEFORE INCOME TAXES	120,718	80,175
PROVISION FOR INCOME TAXES	20,167	19,877
NET INCOME	$ 100,551	$ 60,298
BASIC EARNINGS PER SHARE (in dollars per share)	$ 2.48	$ 1.5
DILUTED EARNINGS PER SHARE (in dollars per share)	$ 2.42	$ 1.45
Weighted average common shares:
Basic (in shares)	40,490	40,299
Diluted (in shares)	41,599	41,492
COMPREHENSIVE INCOME:
Net income	$ 100,551	$ 60,298
Net unrealized depreciation on marketable securities, net of tax	(75)	(173)
TOTAL COMPREHENSIVE INCOME	100,476	60,125
Flying agreements
OPERATING REVENUES:
Total operating revenues	915,994	778,289
Lease, airport services and other
OPERATING REVENUES:
Total operating revenues	$ 32,461	$ 25,325