Real Estate and Lending Activities - Components of Net Investment in Direct Financing Leases (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Business Combinations [Abstract]
Minimum lease payments receivable	$ 2,192,020	$ 2,207,625
Estimated residual values	407,647	407,647
Less: Unearned income	(1,949,279)	(1,967,170)
Net investment in direct financing leases	$ 650,388	$ 648,102

Estimated Residual Values

No definition available.

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- References

No definition available.

+ Details

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- Definition

Amount of minimum lease payments to be received by the lessor for capital leases.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 50
-Paragraph 4
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738

+ Details

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- Definition

This element represents revenue received, but not recognized for financial reporting purposes. Such deferred revenue may consist of and include amounts paid in advance by lessees and is net of the accumulated amortization of such amounts that to date have been recognized in revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.15)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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- Definition

The net amount due as of the balance sheet date consisting of: (a) minimum lease payments due on direct financing and sales-type leases, (b) unguaranteed residual value, and (c) any unamortized initial direct costs on direct financing leases; less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=25496975&loc=d3e45377-112738

+ Details

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Period Type:	instant