Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income	$ 37,520	$ 32,927
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	49,317	45,205
Amortization of deferred financing costs	1,683	1,283
Amortization of net loss on terminated derivative instruments designated as cash flow hedges	783	800
Net (gain) on sale of leasing equipment	(10,261)	(10,760)
Net (gain) on interest rate swaps	(3,152)	(2,972)
Deferred income taxes	20,310	18,043
Stock compensation charge	1,857	1,212
Changes in operating assets and liabilities:
Net equipment purchased for resale activity	(18,835)	(6,798)
Realized loss on interest rate swaps terminated prior to their contractual maturities		(5,498)
Other changes in operating assets and liabilities	(12,763)	(11,717)
Net cash provided by operating activities	66,459	61,725
Cash flows from investing activities:
Purchases of leasing equipment and investments in finance leases	(195,221)	(123,100)
Proceeds from sale of equipment, net of selling costs	37,352	29,371
Cash collections on finance lease receivables, net of income earned	8,951	8,526
Other	(316)	88
Net cash (used in) investing activities	(149,234)	(85,115)
Cash flows from financing activities:
Stock options exercised and stock related activity	(304)	132
Financing fees paid under debt facilities	(7,527)	(638)
Borrowings under debt facilities and proceeds under capital lease obligations	704,207	121,500
Payments under debt facilities and capital lease obligations	(596,475)	(148,346)
(Increase) decrease in restricted cash	(2,686)	1,936
Common stock dividends paid	(21,429)	(18,264)
Net cash provided by (used in) financing activities	75,786	(43,680)
Net (decrease) increase in unrestricted cash and cash equivalents	(6,989)	(67,070)
Unrestricted cash and cash equivalents, beginning of period	65,843	140,877
Unrestricted cash and cash equivalents, end of period	58,854	73,807
Supplemental non-cash investing activities:
Equipment purchases payable	$ 74,163	$ 32,292