Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 1,110,688	$ 1,346,350
Restricted cash	119,400	119,392
Short-term investment securities	109,494	107,115
Accounts receivable, net	186,739	197,276
Income tax receivable	36,261	36,261
Prepaid expenses and other current assets	210,252	187,589
Total current assets	1,772,834	1,993,983
Property and equipment:
Flight equipment	4,219,907	4,326,515
Ground property and equipment	629,928	521,802
Less accumulated depreciation	(1,109,335)	(1,098,819)
Total property and equipment, net	3,740,500	3,749,498
Operating lease right-of-use assets	3,058,137	2,699,574
Pre-delivery deposits on flight equipment	508,957	487,553
Deferred heavy maintenance, net	252,682	190,349
Other long-term assets	39,017	63,817
Total assets	9,372,127	9,184,774
Current liabilities:
Accounts payable	76,158	75,449
Air traffic liability	479,677	429,618
Current maturities of long-term debt, net, and finance leases	235,579	346,888
Current maturities of operating leases	201,337	188,296
Other current liabilities	693,211	556,330
Total current liabilities	1,685,962	1,596,581
Long-term debt, net and finance leases, less current maturities	3,081,192	3,200,376
Operating leases, less current maturities	2,793,437	2,455,619
Deferred income taxes	205,796	226,843
Deferred gains and other long-term liabilities	134,668	133,704
Shareholders’ equity:
Common stock	11	11
Additional paid-in-capital	1,153,068	1,146,015
Treasury stock, at cost	(79,672)	(77,998)
Retained earnings	397,959	504,219
Accumulated other comprehensive loss	(294)	(596)
Total shareholders’ equity	1,471,072	1,571,651
Total liabilities and shareholders’ equity	$ 9,372,127	$ 9,184,774