Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 1,346,350	$ 1,333,507
Restricted cash	119,392	95,400
Short-term investment securities	107,115	106,313
Accounts receivable, net	197,276	128,828
Income tax receivable	36,261	37,890
Prepaid expenses and other current assets	187,589	140,553
Total current assets	1,993,983	1,842,491
Property and equipment:
Flight equipment	4,326,515	4,356,523
Ground property and equipment	521,802	384,928
Less accumulated depreciation	(1,098,819)	(884,858)
Total property and equipment	3,749,498	3,856,593
Operating lease right-of-use assets	2,699,574	1,950,520
Pre-delivery deposits on flight equipment	487,553	484,821
Deferred heavy maintenance, net	190,349	330,062
Other long-term assets	63,817	75,538
Total assets	9,184,774	8,540,025
Current liabilities:
Accounts payable	75,449	44,952
Air traffic liability	429,618	382,317
Current maturities of long-term debt, net, and finance leases	346,888	208,948
Current maturities of operating leases	188,296	158,631
Other current liabilities	556,330	480,754
Total current liabilities	1,596,581	1,275,602
Long-term debt and finance leases, less current maturities	3,200,376	2,975,823
Operating leases, less current maturities	2,455,619	1,751,351
Deferred income taxes	226,843	375,472
Deferred gains and other long-term liabilities	133,704	47,742
Shareholders’ equity:
Common stock: Common stock, $0.0001 par value, 240,000,000 shares authorized at December 31, 2022 and 2021, respectively; 110,840,751 and 110,221,939 issued and 108,941,920 and 108,429,827 outstanding as of December 31, 2022 and 2021, respectively	11	11
Additional paid-in-capital	1,146,015	1,131,826
Treasury stock, at cost: 1,898,831 and 1,792,112 as of December 31, 2022 and 2021, respectively	(77,998)	(75,639)
Retained earnings	504,219	1,058,369
Accumulated other comprehensive loss	(596)	(532)
Total shareholders’ equity	1,571,651	2,114,035
Total liabilities and shareholders’ equity	$ 9,184,774	$ 8,540,025