CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating Activities
Net income	$ 422,186	$ 372,436
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of flight equipment	514,948	428,437
Stock-based compensation	14,934	13,165
Deferred taxes	97,566	95,674
Amortization of debt discounts and issuance costs	26,330	24,231
Amortization of prepaid lease costs	24,190	18,713
Gain on aircraft sales, trading and other activity	(45,123)	(24,469)
Changes in operating assets and liabilities:
Other assets	(149,740)	(62,528)
Accrued interest and other payables	51,156	110
Rentals received in advance	15,109	4,335
Net cash provided by operating activities	971,556	870,104
Investing Activities
Acquisition of flight equipment under operating lease	(3,021,758)	(1,874,094)
Payments for deposits on flight equipment purchases	(727,982)	(548,225)
Proceeds from aircraft sales, trading and other activity	426,382	239,067
Acquisition of aircraft furnishings, equipment and other assets	(236,847)	(204,449)
Net cash used in investing activities	(3,560,205)	(2,387,701)
Financing Activities
Issuance of common stock upon exercise of options	31,823	4,188
Cash dividends paid on Class A common stock	(43,383)	(31,155)
Preferred dividends paid	(8,115)
Tax withholdings on stock-based compensation	(4,089)	(7,141)
Net change in unsecured revolving facility	8,000	(847,000)
Proceeds from debt financings	3,135,918	3,358,885
Payments in reduction of debt financings	(947,837)	(1,131,206)
Net proceeds from preferred stock issuance	242,139
Debt issuance costs	(9,443)	(9,327)
Security deposits and maintenance reserve receipts	230,966	173,754
Security deposits and maintenance reserve disbursements	(33,905)	(52,764)
Net cash provided by financing activities	2,602,074	1,458,234
Net increase/(decrease) in cash	13,425	(59,363)
Cash, cash equivalents and restricted cash at beginning of period	322,998	308,282
Cash, cash equivalents and restricted cash at end of period	336,423	248,919
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest, including capitalized interest of $46,314 and $38,947 at September 30, 2019 and 2018, respectively	358,237	278,297
Cash paid for income taxes	9,515	2,506
Supplemental Disclosure of Noncash Activities
Buyer furnished equipment, capitalized interest and deposits on flight equipment purchases applied to acquisition of flight equipment	1,161,573	663,223
Cash dividends declared on Class A common stock, not yet paid	$ 14,644	$ 10,407