Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 1,197,065	$ 1,333,507
Restricted cash	95,400	95,400
Short-term investment securities	105,920	106,313
Accounts receivable, net	150,149	128,828
Aircraft maintenance deposits, net	12,228	10,726
Income tax receivable	37,890	37,890
Prepaid expenses and other current assets	163,202	129,827
Total current assets	1,761,854	1,842,491
Property and equipment:
Flight equipment	4,424,409	4,356,523
Ground property and equipment	423,821	384,928
Less accumulated depreciation	(989,812)	(884,858)
Total property and equipment, net	3,858,418	3,856,593
Operating lease right-of-use assets	2,198,791	1,950,520
Pre-delivery deposits on flight equipment	488,323	484,821
Long-term aircraft maintenance deposits	27,795	38,166
Deferred heavy maintenance, net	342,335	330,062
Other long-term assets	37,507	37,372
Total assets	8,715,023	8,540,025
Current liabilities:
Accounts payable	76,048	44,952
Air traffic liability	561,705	382,317
Current maturities of long-term debt, net and finance leases	351,521	208,948
Current maturities of operating leases	169,195	158,631
Other current liabilities	578,663	480,754
Total current liabilities	1,737,132	1,275,602
Long-term debt, net and finance leases, less current maturities	2,696,201	2,975,823
Operating leases, less current maturities	1,981,467	1,751,351
Deferred income taxes	310,351	375,472
Deferred gains and other long-term liabilities	116,657	47,742
Shareholders’ equity:
Common stock	11	11
Additional paid-in-capital	1,140,254	1,131,826
Treasury stock, at cost	(77,416)	(75,639)
Retained earnings	811,260	1,058,369
Accumulated other comprehensive loss	(894)	(532)
Total shareholders’ equity	1,873,215	2,114,035
Total liabilities and shareholders’ equity	$ 8,715,023	$ 8,540,025