Condensed Consolidated Balance Sheets (unaudited) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Current assets:    
Cash and cash equivalents $ 1,774,471 $ 1,789,723
Restricted cash 64,000 71,401
Short-term investment securities 106,376 106,339
Accounts receivable, net 100,366 42,940
Aircraft maintenance deposits, net 72,281 73,134
Income tax receivable 37,472 147,460
Prepaid expenses and other current assets 121,127 124,983
Total current assets 2,276,093 2,355,980
Property and equipment:    
Flight equipment 4,207,088 4,177,631
Ground property and equipment 341,050 334,167
Less accumulated depreciation (731,308) (680,230)
Total property and equipment, net 3,816,830 3,831,568
Operating lease right-of-use assets 1,461,743 1,417,823
Pre-delivery deposits on flight equipment 412,682 356,262
Long-term aircraft maintenance deposits 50,431 53,158
Deferred heavy maintenance, net 334,508 347,907
Other long-term assets 35,448 36,127
Total assets 8,387,735 8,398,825
Current liabilities:    
Accounts payable 33,199 28,454
Air traffic liability 509,172 401,966
Current maturities of long-term debt and finance leases 356,623 384,197
Current maturities of operating leases 135,260 133,791
Other current liabilities 473,826 393,614
Total current liabilities 1,508,080 1,342,022
Long-term debt and finance leases, less current maturities 3,048,378 3,066,635
Operating leases, less current maturities 1,290,800 1,248,519
Deferred income taxes 398,097 439,894
Deferred gains and other long-term liabilities 49,391 52,060
Shareholders’ equity:    
Common stock 10 10
Additional paid-in-capital 750,359 799,549
Treasury stock, at cost (75,431) (74,124)
Retained earnings 1,418,617 1,524,878
Accumulated other comprehensive income (loss) (566) (618)
Total shareholders’ equity 2,092,989 2,249,695
Total liabilities and shareholders’ equity $ 8,387,735 $ 8,398,825