CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Operating Activities
Net income	$ 82,986	$ 55,099
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of flight equipment	132,646	96,873
Stock-based compensation	14,088	17,424
Deferred taxes	44,997	30,391
Amortization of discounts and deferred debt issue costs	10,559	6,958
Changes in operating assets and liabilities:
Other assets	8,555	(8,387)
Accrued interest and other payables	5,462	31,161
Rentals received in advance	8,587	10,701
Net cash provided by operating activities	307,880	240,220
Investing Activities
Acquisition of flight equipment under operating lease	(705,774)	(1,256,809)
Payments for deposits on flight equipment purchases	(464,636)	(250,836)
Acquisition of furnishings, equipment and other assets	(47,327)	(55,243)
Net cash used in investing activities	(1,217,737)	(1,562,888)
Financing Activities
Issuance of common stock		70
Cash dividends paid	(2,532)
Tax withholdings related to vesting of restricted stock units	(1,742)
Net change in unsecured revolving facilities	530,000	122,000
Proceeds from debt financings	653,849	1,586,188
Payments in reduction of debt financings	(343,518)	(287,369)
Restricted cash	28,332	(16,852)
Debt issue costs	(26,261)	(32,661)
Security deposits and maintenance reserve receipts	90,092	78,247
Security deposits and maintenance reserve disbursements	(14,153)	(20,173)
Net cash provided by financing activities	914,067	1,429,450
Net increase in cash	4,210	106,782
Cash and cash equivalents at beginning of period	230,089	281,805
Cash and cash equivalents at end of period	234,299	388,587
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest, including capitalized interest of $14,887 and $8,631 at June 30, 2013 and 2012	87,511	43,010
Supplemental Disclosure of Noncash Activities
Buyer furnished equipment, capitalized interest, deposits on flight equipment purchases and seller financing applied to acquisition of flight equipment	163,464	255,900
Cash dividends declared, not yet paid	$ 2,533