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Components of Investment in Direct Financing Leases (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Capital Leased Assets [Line Items]
Total minimum lease payments receivable	$ 128	$ 248
Estimated residual values of leased equipment (unguaranteed)	52	54
Investment in direct financing leases	180	302
Less unearned income	(13)	(46)
Net investment in direct financing leases	$ 167	$ 256

- 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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