Operating Segments and Related Disclosures - Geographic Revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]
Total operating revenues	$ 5,362,549	$ 5,068,447	$ 3,230,775
DOT—Domestic
Revenues from External Customers and Long-Lived Assets [Line Items]
Total operating revenues	4,676,100	4,371,800	2,824,800
DOT—Latin America and Caribbean
Revenues from External Customers and Long-Lived Assets [Line Items]
Total operating revenues	$ 686,400	$ 696,600	$ 406,000