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Components of Partnership's Investment in Direct Financing Leases (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Capital Leased Assets [Line Items]
Total minimum lease payments receivable	$ 254	$ 533
Estimated residual values of leased equipment (unguaranteed)	65	75
Investment in direct financing leases	319	608
Less unearned income	(64)	(203)
Net investment in direct financing leases	$ 255	$ 405

- Definition

The remaining (unamortized) difference between the gross investment in a direct financing lease and the cost or carrying amount, if different, of the leased property as of the balance sheet date.

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