Summary of Significant Accounting Policies - Airframe and Engine Maintenance (Details) - USD ($) $ in Thousands	2 Months Ended	10 Months Ended	12 Months Ended
	Mar. 12, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Mar. 13, 2025
Property, Plant and Equipment [Line Items]
Deferred costs for heavy maintenance	$ 26,700	$ 30,100	$ 86,400	$ 202,900
Deferred heavy maintenance, gross		287,200	577,300
Accumulated heavy maintenance amortization		126,085	1,027,872		$ 0
Airframe and Engine Maintenance Costs [Abstract]
Total maintenance, materials and repairs	47,498	159,599	217,738	223,339
Utilization-based maintenance expense
Airframe and Engine Maintenance Costs [Abstract]
Total maintenance, materials and repairs	19,981	68,537	103,232	117,458
Non-utilization-based maintenance expense
Airframe and Engine Maintenance Costs [Abstract]
Total maintenance, materials and repairs	27,517	91,062	114,506	105,881
Heavy maintenance and major overhaul
Property, Plant and Equipment [Line Items]
Amortization of heavy maintenance	$ 21,074	56,440	113,522	$ 79,768
Heavy Maintenance
Property, Plant and Equipment [Line Items]
Accumulated heavy maintenance amortization		$ 77,900	$ 273,800