Investments in Real Estate - Schedule of Details of Dispositions (Detail) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020 USD ($) Property	Sep. 30, 2019 USD ($) Property	Sep. 30, 2020 USD ($) Property	Sep. 30, 2019 USD ($) Property
Real Estate Properties [Line Items]
Number of Properties \| Property	7	1	8	1
Net Proceeds	$ 380,781	$ 30,276	$ 385,269	$ 74,568
Net Gain	$ 100,070	$ 6,481	$ 100,441	36,167
Multifamily Properties [Member]
Real Estate Properties [Line Items]
Number of Properties \| Property	6		6
Net Proceeds	$ 246,244		$ 246,244
Net Gain	$ 64,885		$ 64,885
Hotel Properties [Member]
Real Estate Properties [Line Items]
Number of Properties \| Property	1		1
Net Proceeds	$ 134,537		$ 134,537	44,292
Net Gain	$ 35,185		$ 35,185	$ 29,686
Industrial [Member]
Real Estate Properties [Line Items]
Number of Properties \| Property		1	1	1
Net Proceeds		$ 30,276	$ 4,488	$ 30,276
Net Gain		$ 6,481	$ 371	$ 6,481

Number of real estate properties sold out.

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- Definition

Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

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- Definition

Cash received for the sale of real estate that is not part of an investing activity during the current period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585

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- Definition

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.

+ References

No definition available.

+ Details

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- Details

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- Details

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