CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating Activities
Net income	$ 266,399	$ 225,862
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of flight equipment	331,160	278,734
Stock-based compensation	10,037	8,317
Deferred taxes	69,081	62,866
Amortization of debt discounts and issuance costs	17,252	16,032
Amortization of prepaid lease costs	14,851	14,610
Gain on aircraft sales, trading and other activity	(14,924)	(2,185)
Changes in operating assets and liabilities:
Other assets	(127,442)	(47,313)
Accrued interest and other payables	85,218	23,737
Rentals received in advance	4,616	7,331
Net cash provided by operating activities	656,248	587,991
Investing Activities
Acquisition of flight equipment under operating lease	(1,962,211)	(1,402,374)
Payments for deposits on flight equipment purchases	(448,653)	(360,440)
Proceeds from aircraft sales, trading and other activity	249,764	250
Acquisition of aircraft furnishings, equipment and other assets	(175,926)	(141,125)
Net cash used in investing activities	(2,337,026)	(1,903,689)
Financing Activities
Issuance of common stock upon exercise of options	11,236	4,128
Cash dividends paid on Class A common stock	(28,866)	(20,757)
Preferred dividends paid	(4,271)
Tax withholdings on stock-based compensation	(3,587)	(7,141)
Net change in unsecured revolving facility	199,000	109,000
Proceeds from debt financings	2,032,137	1,738,665
Payments in reduction of debt financings	(920,723)	(594,706)
Net proceeds from preferred stock issuance	242,130
Debt issuance costs	(7,327)	(5,301)
Security deposits and maintenance reserve receipts	142,685	109,007
Security deposits and maintenance reserve disbursements	(16,532)	(44,421)
Net cash provided by financing activities	1,645,882	1,288,474
Net decrease in cash	(34,896)	(27,224)
Cash, cash equivalents and restricted cash at beginning of period	322,998	308,282
Cash, cash equivalents and restricted cash at end of period	288,102	281,058
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest, including capitalized interest of $31,602 and $25,692 at June 30, 2019 and 2018, respectively	210,808	149,077
Cash paid for income taxes	3,291	555
Supplemental Disclosure of Noncash Activities
Buyer furnished equipment, capitalized interest and deposits on flight equipment purchases applied to acquisition of flight equipment	711,432	451,048
Cash dividends declared on Class A common stock, not yet paid	$ 14,516	$ 10,399