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Investments in Real Estate - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($) Property	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) Property	Sep. 30, 2015 USD ($)
Real Estate Properties [Line Items]
Number of multifamily properties owned | Property	46		46
Number of units located with multifamily properties | Property	12,982		12,982
Fair value of net assets acquired	$ 641	$ 64,012	$ 732	$ 64,012
Gain (loss) on sale			31,782
Exit fees pursuant to mortgage indebtedness				$ 23,219
TSRE Properties
Real Estate Properties [Line Items]
Fair value of net assets acquired	$ 641		91
Multifamily Property
Real Estate Properties [Line Items]
Gain (loss) on sale			(9)
Belle Creek
Real Estate Properties [Line Items]
Gain (loss) on sale			14,191
Exit fees pursuant to mortgage indebtedness			211
Tresa
Real Estate Properties [Line Items]
Gain (loss) on sale			15,139
Exit fees pursuant to mortgage indebtedness			$ 275

X

- Definition

In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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X

- Definition

The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The number of real estate properties owned as of the balance sheet date.

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- Definition

The number of units in a real estate property owned as of the balance sheet date.

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The cash outflow for incremental, external costs directly pertaining to an early extinguishment of debt, including legal costs and prepayment penalties, and excluding interest and repayment of debt principal.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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