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Organization and Summary of Significant Accounting Policies Lease Transfers to 3rd party lessors during period (Details) (Lease Agreements [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Lease Agreements [Member]
Third Party Lease Transfers [Line Items]
Cash Flows Between Transferor and Transferee, Proceeds from New Transfers	$ 10.6	$ 15.7	$ 20.9	$ 27.8

Cash Flows between a transferor and a transferee attributable to newly transferred assets related to either a securitization, asset-backed financing arrangement, or similar transfer in which the transferor has continuing involvement with the transferred financial assets underlying the transaction (including, but not limited to, servicing, recourse, and restrictions on transferor's interests in the transferred financial assets).

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