Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 865,211	$ 1,346,350
Restricted cash	119,400	119,392
Short-term investment securities	112,501	107,115
Accounts receivable, net	205,468	197,276
Income tax receivable	0	36,261
Prepaid expenses and other current assets	209,547	187,589
Total current assets	1,512,127	1,993,983
Property and equipment:
Flight equipment	3,961,785	4,326,515
Ground property and equipment	726,364	521,802
Less accumulated depreciation	(1,169,021)	(1,098,819)
Total property and equipment	3,519,128	3,749,498
Operating lease right-of-use assets	3,561,028	2,699,574
Pre-delivery deposits on flight equipment	480,717	487,553
Deferred heavy maintenance, net	313,505	190,349
Other long-term assets	30,732	63,817
Total assets	9,417,237	9,184,774
Current liabilities:
Accounts payable	42,098	75,449
Air traffic liability	383,751	429,618
Current maturities of long-term debt, net, and finance leases	315,580	346,888
Current maturities of operating leases	224,865	188,296
Other current liabilities	705,298	556,330
Total current liabilities	1,671,592	1,596,581
Long-term debt and finance leases, less current maturities	3,055,221	3,200,376
Operating leases, less current maturities	3,298,871	2,455,619
Deferred income taxes	107,761	226,843
Deferred gains and other long-term liabilities	149,450	133,704
Shareholders’ equity:
Common stock: Common stock, $0.0001 par value, 240,000,000 shares authorized at December 31, 2023 and 2022, respectively; 111,303,660 and 110,840,751 issued and 109,263,005 and 108,941,920 outstanding as of December 31, 2023 and 2022, respectively	11	11
Additional paid-in-capital	1,158,278	1,146,015
Treasury stock, at cost: 2,040,655 and 1,898,831 as of December 31, 2023 and 2022, respectively	(80,635)	(77,998)
Retained earnings	56,755	504,219
Accumulated other comprehensive income (loss)	(67)	(596)
Total shareholders’ equity	1,134,342	1,571,651
Total liabilities and shareholders’ equity	$ 9,417,237	$ 9,184,774