CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating Activities
Net income	$ 277,937	$ 172,492
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of flight equipment	333,962	291,460
Stock-based compensation expense	12,342	12,372
Deferred taxes	152,898	95,233
Amortization of debt discounts and issuance costs	22,630	22,782
Gain on aircraft sales, trading and other activity	(47,687)	(29,061)
Changes in operating assets and liabilities:
Other assets	(24,305)	18,384
Accrued interest and other payables	23,769	(5,857)
Rentals received in advance	9,933	8,753
Net cash provided by operating activities	761,479	586,558
Investing Activities
Acquisition of flight equipment under operating lease	(1,436,679)	(1,697,742)
Payments for deposits on flight equipment purchases	(641,737)	(482,798)
Proceeds from aircraft sales, trading and other activity	649,210	691,458
Acquisition of furnishings, equipment and other assets	(165,378)	(189,493)
Net cash used in investing activities	(1,594,584)	(1,678,575)
Financing Activities
Issuance of common stock upon exercise of options		40
Cash dividends paid	(15,413)	(12,302)
Tax withholdings on stock-based compensation	(5,890)	(5,302)
Net change in unsecured revolving facilities	298,000	(75,000)
Proceeds from debt financings	1,526,001	1,217,384
Payments in reduction of debt financings	(1,000,559)	(293,736)
Net change in restricted cash	(534)	(3,231)
Debt issuance costs	(4,362)	(4,188)
Security deposits and maintenance reserve receipts	153,151	150,318
Security deposits and maintenance reserve disbursements	(47,142)	(45,063)
Net cash provided by financing activities	903,252	928,920
Net increase (decrease) in cash	70,147	(163,097)
Cash and cash equivalents at beginning of period	156,675	282,819
Cash and cash equivalents at end of period	226,822	119,722
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest, including capitalized interest of $30,137 and $30,449 at September 30, 2016 and 2015, respectively	224,420	199,745
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	642,417	766,616
Cash dividends declared, not yet paid	$ 5,142	$ 4,103