Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 818,323	$ 1,346,350
Restricted cash	119,400	119,392
Short-term investment securities	110,933	107,115
Accounts receivable, net	170,959	197,276
Income tax receivable	549	36,261
Prepaid expenses and other current assets	228,878	187,589
Total current assets	1,449,042	1,993,983
Property and equipment:
Flight equipment	4,216,125	4,326,515
Ground property and equipment	677,815	521,802
Less accumulated depreciation	(1,161,980)	(1,098,819)
Total property and equipment, net	3,731,960	3,749,498
Operating lease right-of-use assets	3,354,082	2,699,574
Pre-delivery deposits on flight equipment	495,300	487,553
Deferred heavy maintenance, net	293,299	190,349
Other long-term assets	37,867	63,817
Total assets	9,361,550	9,184,774
Current liabilities:
Accounts payable	86,297	75,449
Air traffic liability	429,355	429,618
Current maturities of long-term debt, net, and finance leases	235,868	346,888
Current maturities of operating leases	210,994	188,296
Other current liabilities	638,286	556,330
Total current liabilities	1,600,800	1,596,581
Long-term debt, net and finance leases, less current maturities	3,043,391	3,200,376
Operating leases, less current maturities	3,108,399	2,455,619
Deferred income taxes	160,054	226,843
Deferred gains and other long-term liabilities	132,861	133,704
Shareholders’ equity:
Common stock	11	11
Additional paid-in-capital	1,155,637	1,146,015
Treasury stock, at cost	(79,706)	(77,998)
Retained earnings	240,407	504,219
Accumulated other comprehensive income (loss)	(304)	(596)
Total shareholders’ equity	1,316,045	1,571,651
Total liabilities and shareholders’ equity	$ 9,361,550	$ 9,184,774