Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 1,287,711	$ 1,346,350
Restricted cash	119,400	119,392
Short-term investment securities	108,357	107,115
Accounts receivable, net	186,070	197,276
Income tax receivable	36,261	36,261
Prepaid expenses and other current assets	180,284	187,589
Total current assets	1,918,083	1,993,983
Property and equipment:
Flight equipment	4,216,067	4,326,515
Ground property and equipment	574,988	521,802
Less accumulated depreciation	(1,052,373)	(1,098,819)
Total property and equipment, net	3,738,682	3,749,498
Operating lease right-of-use assets	2,859,829	2,699,574
Pre-delivery deposits on flight equipment	516,099	487,553
Deferred heavy maintenance, net	230,014	190,349
Other long-term assets	59,610	63,817
Total assets	9,322,317	9,184,774
Current liabilities:
Accounts payable	53,046	75,449
Air traffic liability	566,856	429,618
Current maturities of long-term debt, net, and finance leases	261,724	346,888
Current maturities of operating leases	195,039	188,296
Other current liabilities	675,944	556,330
Total current liabilities	1,752,609	1,596,581
Long-term debt, net and finance leases, less current maturities	3,164,061	3,200,376
Operating leases, less current maturities	2,605,011	2,455,619
Deferred income taxes	189,054	226,843
Deferred gains and other long-term liabilities	141,736	133,704
Shareholders’ equity:
Common stock	11	11
Additional paid-in-capital	1,149,588	1,146,015
Treasury stock, at cost	(79,671)	(77,998)
Retained earnings	400,308	504,219
Accumulated other comprehensive loss	(390)	(596)
Total shareholders’ equity	1,469,846	1,571,651
Total liabilities and shareholders’ equity	$ 9,322,317	$ 9,184,774