CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating Activities
Net income	$ 39,996	$ 26,927
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of flight equipment	63,863	44,336
Stock-based compensation	6,775	8,217
Deferred taxes	21,676	14,679
Amortization of discounts and deferred debt issue costs	5,210	2,867
Changes in operating assets and liabilities:
Other assets	6,739	(7,658)
Accrued interest and other payables	11,048	7,529
Rentals received in advance	5,834	4,625
Net cash provided by operating activities	161,141	101,522
Investing Activities
Acquisition of flight equipment under operating lease	(323,431)	(458,710)
Payments for deposits on flight equipment purchases	(299,029)	(104,006)
Acquisition of furnishings, equipment and other assets	(36,708)	(35,113)
Net cash used in investing activities	(659,168)	(597,829)
Financing Activities
Cash dividends paid	(2,532)
Tax witholdings related to vesting of restricted stock units	(1,742)
Net change in unsecured revolving facilities	25,000	(245,500)
Proceeds from debt financings	551,030	1,465,949
Payments in reduction of debt financings	(99,953)	(178,433)
Restricted cash	(4,251)	(16,220)
Debt issue costs	(10,760)	(23,291)
Security deposits and maintenance reserve receipts	40,333	26,703
Security deposits and maintenance reserve disbursements	(11,564)	(11,440)
Net cash provided by financing activities	485,561	1,017,768
Net (decrease) increase in cash	(12,466)	521,461
Cash and cash equivalents at beginning of period	230,089	281,805
Cash and cash equivalents at end of period	217,623	803,266
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest, including capitalized interest of $6,899 and $3,949 at March 31, 2013 and 2012	30,600	17,408
Supplemental Disclosure of Noncash Activities
Buyer furnished equipment, capitalized interest, deposits on flight equipment purchases and seller financing applied to acquisition of flight equipment	$ 108,493	$ 105,590