CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities
Net income	$ 436,632	$ 516,264	$ 587,121
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of flight equipment	882,562	780,691	702,810
Stock-based compensation	26,516	17,628	20,745
Deferred taxes	97,446	166,467	92,049
Amortization of prepaid lease costs	46,547	43,224	32,849
Amortization of debt discounts and issuance costs	50,620	43,025	36,691
Gain on aircraft sales, trading and other activity	(46,109)	(34,654)	(89,417)
Changes in operating assets and liabilities:
Other assets	(176,391)	(415,347)	(153,879)
Accrued interest and other payables	63,112	(22,810)	139,337
Rentals received in advance	(4,099)	(4,302)	24,166
Net cash provided by operating activities	1,376,836	1,090,186	1,392,472
Investing Activities
Acquisition of flight equipment under operating lease	(2,506,175)	(1,631,551)	(3,663,605)
Payments for deposits on flight equipment purchases	(496,838)	(885,679)	(884,459)
Proceeds from aircraft sales, trading and other activity	137,887	151,132	995,345
Acquisition of aircraft furnishings, equipment and other assets	(229,654)	(160,993)	(291,258)
Net cash used in investing activities	(3,094,780)	(2,527,091)	(3,843,977)
Financing Activities
Issuance of common stock upon exercise of options and warrants	1,438	6,569	44,885
Issuance of preferred stock	591,340	0	242,130
Cash dividends paid on Class A common stock	(73,001)	(68,183)	(58,026)
Common shares repurchased	(5,780)	0	0
Preferred dividends paid	(28,473)	(15,375)	(11,958)
Tax withholdings on stock-based compensation	(7,441)	(8,618)	(4,272)
Net change in unsecured revolving facilities	0	(20,000)	(582,000)
Proceeds from debt financings	3,655,830	4,659,762	3,567,728
Payments in reduction of debt financings	(3,194,482)	(1,728,029)	(978,369)
Debt issuance costs	(10,245)	(8,102)	(11,280)
Security deposits and maintenance reserve receipts	174,521	114,596	310,220
Security deposits and maintenance reserve disbursements	(35,238)	(76,009)	(52,490)
Net cash provided by financing activities	1,068,469	2,856,611	2,466,568
Net (decrease)/increase in cash	(649,475)	1,419,706	15,063
Cash, cash equivalents and restricted cash at beginning of period	1,757,767	338,061	322,998
Cash, cash equivalents and restricted cash at end of period	1,108,292	1,757,767	338,061
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest, including capitalized interest of $49,070, $53,163 and $59,358 at December 31, 2021, 2020 and 2019, respectively	508,616	449,662	442,132
Cash paid for income taxes	5,734	29,733	16,657
Supplemental Disclosure of Noncash Activities
Buyer furnished equipment, capitalized interest, deposits on flight equipment purchases and seller financing applied to acquisition of flight equipment and other assets applied to payments for deposits on flight equipment purchases	1,009,554	782,896	1,399,136
Cash dividends declared, not yet paid	$ 21,088	$ 18,216	$ 17,003