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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Statement of Cash Flows [Abstract]      
Net (loss) income $ (294,923) $ 1,166,777 $ 1,017,497
Adjustments to reconcile net (loss) income to net cash provided by operating activities:      
Depreciation and amortization 1,645,373 1,676,121 1,679,074
Asset impairment 1,086,983 70,149 44,186
Amortization of debt issuance costs, debt discount, debt premium and lease premium 64,970 79,645 76,499
Amortization of fair value adjustments on debt (47,279) (79,098) (142,596)
Maintenance rights write-off [1] 133,015 244,748 287,119
Maintenance liability release to income (344,210) (207,849) (228,081)
Net gain on sale of assets (89,618) (188,835) (201,323)
Deferred income taxes (20,882) 162,498 147,588
Share-based compensation 69,187 69,410 95,176
Collections of finance and sales-type leases 68,128 98,365 0
Loss on investment at fair value 143,510 0 0
Loss on debt extinguishment 118,460 0 0
Other 252,350 96,117 60,452
Changes in operating assets and liabilities:      
Trade receivables (128,188) (8,751) 19,839
Other assets (400,316) (73,646) 9,800
Accounts payable, accrued expenses and other liabilities (126,177) 31 (24,858)
Net cash provided by operating activities 2,130,383 3,105,682 2,840,372
Purchase of flight equipment (778,547) (3,359,092) (4,036,194)
Proceeds from sale or disposal of assets 471,437 1,773,766 1,822,601
Prepayments on flight equipment (405,178) (1,369,400) (1,912,215)
Collections of finance and sales-type leases 0 0 94,703
Other 0 (17) (21,505)
Net cash used in investing activities (712,288) (2,954,743) (4,052,610)
Issuance of debt 10,946,333 6,539,310 5,589,825
Repayment of debt (11,560,015) (6,504,830) (4,360,520)
Debt issuance and extinguishment costs paid, net of debt premium received (253,806) (36,592) (57,831)
Maintenance payments received 345,699 736,423 743,256
Maintenance payments returned (412,492) (352,032) (459,326)
Security deposits received 137,130 232,219 208,259
Security deposits returned (297,469) (233,222) (220,452)
Dividend paid to non-controlling interest holders and others (2,935) (6,341) (8,403)
Repurchase of shares and tax withholdings on share-based compensation (127,777) (639,941) (834,398)
Net cash (used in) provided by financing activities (1,225,332) (265,006) 600,410
Net increase (decrease) in cash, cash equivalents and restricted cash 192,763 (114,067) (611,828)
Effect of exchange rate changes 2,180 (621) 2,738
Cash, cash equivalents and restricted cash at beginning of period 1,300,347 1,415,035 2,024,125
Cash, cash equivalents and restricted cash at end of period 1,495,290 1,300,347 1,415,035
Supplemental cash flow information:      
Interest paid, net of amounts capitalized 1,196,467 1,270,532 1,228,788
Income taxes (refunded) paid, net $ (3,862) $ 2,352 $ 679
[1] Maintenance rights write-off consisted of the following:
End of lease ("EOL") and Maintenance Reserved ("MR") contract maintenance
rights expense
$45,655 $76,611 $157,792 
MR contract maintenance rights write-off due to maintenance liability release35,897 19,848 29,656 
EOL contract maintenance rights write-off due to cash receipt51,463 148,289 99,671 
Maintenance rights write-off$133,015 $244,748 $287,119