Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 764,788	$ 865,211
Restricted cash	133,585	119,400
Short-term investment securities	113,854	112,501
Accounts receivable, net	212,469	205,468
Prepaid expenses and other current assets	263,713	209,547
Total current assets	1,488,409	1,512,127
Property and equipment:
Flight equipment	3,798,197	3,961,785
Ground property and equipment	787,631	726,364
Less accumulated depreciation	(1,185,536)	(1,169,021)
Total property and equipment, net	3,400,292	3,519,128
Operating lease right-of-use assets	3,859,596	3,561,028
Pre-delivery deposits on flight equipment	443,478	480,717
Deferred heavy maintenance, net	307,276	313,505
Other long-term assets	27,444	30,732
Total assets	9,526,495	9,417,237
Current liabilities:
Accounts payable	85,074	42,098
Air traffic liability	475,653	383,751
Current maturities of long-term debt, net, and finance leases	156,812	315,580
Current maturities of operating leases	234,062	224,865
Other current liabilities	577,433	705,298
Total current liabilities	1,529,034	1,671,592
Long-term debt, net and finance leases, less current maturities	3,175,555	3,055,221
Operating leases, less current maturities	3,593,771	3,298,871
Deferred income taxes	92,783	107,761
Deferred gains and other long-term liabilities	133,095	149,450
Shareholders’ equity:
Common stock	11	11
Additional paid-in-capital	1,169,562	1,158,278
Treasury stock, at cost	(81,271)	(80,635)
Retained earnings (deficit)	(85,880)	56,755
Accumulated other comprehensive income (loss)	(165)	(67)
Total shareholders’ equity	1,002,257	1,134,342
Total liabilities and shareholders’ equity	$ 9,526,495	$ 9,417,237