Real Estate and Lending Activities - Summary of Operations for Disposed Assets in 2018 (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disposal Group Not Discontinued Operation Income Statement Disclosures [Abstract]
Revenues	$ 34,142	$ 28,817	$ 69,900	$ 55,536
Real estate depreciation and amortization	(6,129)	(7,070)	(14,902)	(13,595)
Property-related expenses	(14)	(1)	(255)	(1)
Other income (expense)	(410)	(5,501)	(969)	(7,045)
Income from real estate dispositions, net	$ 27,589	$ 16,245	$ 53,774	$ 34,895

Disposal group including discontinued operation other income expense.

No definition available.

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- Definition

Disposal group including discontinued operation property related expense.

+ References

No definition available.

+ Details

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- Definition

Amount of depreciation and amortization expense attributable to disposal group, including, but not limited to, discontinued operation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760

+ Details

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- Definition

Amount of gross profit attributable to disposal group, including, but not limited to, discontinued operation.

+ References

+ Details

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- Definition

Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation.

+ References

+ Details

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- References

No definition available.

+ Details

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