CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating Activities
Net income	$ 284,851	$ 405,171
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of flight equipment	651,742	577,969
Stock-based compensation	18,800	14,956
Deferred taxes	64,931	101,285
Amortization of debt discounts and issuance costs	37,109	31,660
Amortization of prepaid lease costs	33,603	32,142
Gain on aircraft sales, trading and other activity	(1,184)	(34,161)
Changes in operating assets and liabilities:
Other assets	(148,982)	(323,924)
Accrued interest and other payables	(7,283)	(84,045)
Rentals received in advance	(4,199)	(3,464)
Net cash provided by operating activities	929,388	717,589
Investing Activities
Acquisition of flight equipment under operating lease	(1,670,203)	(777,410)
Payments for deposits on flight equipment purchases	(303,856)	(581,054)
Proceeds from aircraft sales, trading and other activity	2,042	151,131
Acquisition of aircraft furnishings, equipment and other assets	(178,359)	(142,866)
Net cash used in investing activities	(2,150,376)	(1,350,199)
Financing Activities
Issuance of common stock upon exercise of options	1,438	4,556
Cash dividends paid on Class A common stock	(54,737)	(51,116)
Common shares repurchased	(5,780)	0
Net proceeds from preferred stock issuance	295,428	0
Preferred dividends paid	(19,010)	(11,531)
Tax withholdings on stock-based compensation	(7,441)	(8,618)
Net change in unsecured revolving facility	0	(20,000)
Proceeds from debt financings	3,655,830	3,074,665
Payments in reduction of debt financings	(2,585,652)	(1,457,740)
Debt issuance costs	(9,688)	(5,692)
Security deposits and maintenance reserve receipts	112,155	91,337
Security deposits and maintenance reserve disbursements	(25,654)	(59,175)
Net cash provided by financing activities	1,356,889	1,556,686
Net increase in cash	135,901	924,076
Cash, cash equivalents and restricted cash at beginning of period	1,757,767	338,061
Cash, cash equivalents and restricted cash at end of period	1,893,668	1,262,137
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest, including capitalized interest of $38,265 and $39,960 at September 30, 2021 and 2020, respectively	428,349	371,947
Cash paid for income taxes	2,739	29,696
Supplemental Disclosure of Noncash Activities
Buyer furnished equipment, capitalized interest and deposits on flight equipment purchases applied to acquisition of flight equipment	663,072	575,958
Cash dividends declared on Class A common stock, not yet paid	$ 18,263	$ 17,068