CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating Activities
Net income	$ 137,151	$ 138,094
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of flight equipment	188,895	159,471
Stock-based compensation	4,429	4,174
Deferred taxes	33,302	36,825
Amortization of discounts and debt issuance costs	10,528	8,540
Amortization of prepaid lease costs	10,454	7,180
Gain on aircraft sales, trading and other activity	(5,554)	(17,167)
Changes in operating assets and liabilities:
Other assets	(88,411)	(93,788)
Accrued interest and other payables	(47,858)	20,789
Rentals received in advance	(8,913)	(2,869)
Net cash provided by operating activities	234,023	261,249
Investing Activities
Acquisition of flight equipment under operating lease	(511,232)	(725,300)
Payments for deposits on flight equipment purchases	(174,589)	(305,284)
Proceeds from aircraft sales, trading and other activity	65,070	247,264
Acquisition of aircraft furnishings, equipment and other assets	(51,576)	(111,162)
Net cash used in investing activities	(672,327)	(894,482)
Financing Activities
Issuance of common stock upon exercise of options	2,025	440
Cash dividends paid on Class A common stock	(17,003)	(14,421)
Preferred dividends paid	(3,844)
Tax withholdings on stock-based compensation	(8,413)	(3,587)
Net change in unsecured revolving facility	495,000	225,000
Proceeds from debt financings	1,449,873	995,779
Payments in reduction of debt financings	(1,093,268)	(896,098)
Net proceeds from preferred stock issuance		242,241
Debt issuance costs	(2,902)	(2,455)
Security deposits and maintenance reserve receipts	50,083	73,145
Security deposits and maintenance reserve disbursements	(17,927)	(11,567)
Net cash provided by financing activities	853,624	608,477
Net increase/(decrease) in cash	415,320	(24,756)
Cash, cash equivalents and restricted cash at beginning of period	338,061	322,998
Cash, cash equivalents and restricted cash at end of period	753,381	298,242
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest, including capitalized interest of $13,261 and $16,226 at March 31, 2020 and 2019, respectively	141,060	137,481
Cash paid for income taxes	2,149	25
Supplemental Disclosure of Noncash Activities
Buyer furnished equipment, capitalized interest and deposits on flight equipment purchases applied to acquisition of flight equipment	191,318	298,962
Cash dividends declared on Class A common stock, not yet paid	$ 17,046	$ 14,445