CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating Activities
Net income	$ 284,776	$ 266,399
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of flight equipment	382,915	331,160
Stock-based compensation	8,321	10,037
Deferred taxes	68,773	69,081
Amortization of debt discounts and issuance costs	20,761	17,252
Amortization of prepaid lease costs	21,210	14,851
Gain on aircraft sales, trading and other activity	(24,642)	(14,924)
Changes in operating assets and liabilities:
Other assets	(265,775)	(127,442)
Accrued interest and other payables	(16,256)	85,218
Rentals received in advance	(11,741)	4,616
Net cash provided by operating activities	468,342	656,248
Investing Activities
Acquisition of flight equipment under operating lease	(550,034)	(1,962,211)
Payments for deposits on flight equipment purchases	(399,028)	(448,653)
Proceeds from aircraft sales, trading and other activity	134,609	249,764
Acquisition of aircraft furnishings, equipment and other assets	(88,110)	(175,926)
Net cash used in investing activities	(902,563)	(2,337,026)
Financing Activities
Issuance of common stock upon exercise of options	4,526	11,236
Cash dividends paid on Class A common stock	(34,049)	(28,866)
Preferred dividends paid	(7,687)	(4,271)
Tax withholdings on stock-based compensation	(8,611)	(3,587)
Net change in unsecured revolving facility	(20,000)	199,000
Proceeds from debt financings	2,386,061	2,032,137
Payments in reduction of debt financings	(1,295,549)	(920,723)
Net proceeds from preferred stock issuance		242,130
Debt issuance costs	(4,219)	(7,327)
Security deposits and maintenance reserve receipts	72,852	142,685
Security deposits and maintenance reserve disbursements	(55,174)	(16,532)
Net cash provided by financing activities	1,038,150	1,645,882
Net increase/(decrease) in cash	603,929	(34,896)
Cash, cash equivalents and restricted cash at beginning of period	338,061	322,998
Cash, cash equivalents and restricted cash at end of period	941,990	288,102
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest, including capitalized interest of $26,185 and $31,602 at June 30, 2020 and 2019, respectively	229,801	210,808
Cash paid for income taxes	2,372	3,291
Supplemental Disclosure of Noncash Activities
Buyer furnished equipment, capitalized interest and deposits on flight equipment purchases applied to acquisition of flight equipment	201,623	711,432
Cash dividends declared on common stock, not yet paid	$ 17,066	$ 14,516