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Equity Investment Basis Adjustment, Amortization Period

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Equity Method Investment, Summarized Financial Information, Impairments

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Investments in Affiliates, Subsidiaries, Associates, and Joint Ventures, Properties Contributed

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Number of Retail Properties

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The charge against earnings resulting from the aggregate write down of assets from their carrying value to their fair value. Includes charges from both continued and discontinued operations.

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Variable Interest Entity, Number of Entities

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- Definition

Area of a real estate property.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Amount of gain on the sale of property that does not qualify for gain recognition as of the balance sheet date.

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No definition available.

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- Definition

This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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- Definition

Amount of gain (loss) on sale or disposal of an equity method investment.

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- Definition

Gross amount of debt extinguished.

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No definition available.

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- Definition

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

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Amount of investment in equity method investee and investment in and advance to affiliate.

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- Definition

The cash inflow associated with the deconsolidation of a previously consolidated subsidiary or sale of an entity that is related to it but not strictly controlled.

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Amount of distribution received from equity method investee for return of investment, classified as investing activities. Excludes distribution for return on investment, classified as operating activities.

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Cash received from the sale of real estate that is held for investment, that is, it is part of an investing activity during the period.

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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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No definition available.

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Investment in Consolidated and Unconsolidated Entities - Narrative (Details) ft² in Thousands					12 Months Ended
	Jan. 22, 2020 USD ($)	Jun. 24, 2019 USD ($)	Nov. 02, 2018 USD ($)	Apr. 17, 2013 USD ($)	Dec. 31, 2019 USD ($) ft² VIE	Dec. 31, 2018 USD ($) ft² VIE property	Dec. 31, 2017 USD ($) ft²	Jan. 01, 2018 USD ($)	Dec. 31, 2013 property
Variable Interest Entity [Line Items]
Number of variable interest entities \| VIE					0
Proceeds from the sale and transfer of investment properties, net					$ 346,707,000	$ 430,514,000	$ 233,686,000
Provision for asset impairment					2,359,000	3,510,000	27,754,000
Investment in unconsolidated entities, impairment loss					0	29,933,000	$ 0
Investment in unconsolidated entities					$ 118,861,000	$ 156,132,000
Retail
Variable Interest Entity [Line Items]
Number of variable interest entities \| VIE						3
Area of real estate property \| ft²					8,300	9,500	12,400
Rockwell Plaza \| Retail
Variable Interest Entity [Line Items]
Equity method investment, Impairments					$ 794,000
Losses on sales of investment real estate					307,000
Bryant Square \| Retail
Variable Interest Entity [Line Items]
Proceeds from the sale and transfer of investment properties, net						$ 2,274,000
Provision for asset impairment						2,020,000
Unconsolidated Entity 1
Variable Interest Entity [Line Items]
Realized gain (loss) on disposal							$ 0
Proceeds from equity method investment, dividends or distributions, return of capital							366,000
Investment in unconsolidated entities							$ 0
IAGM Retail Fund I, LLC \| Retail
Variable Interest Entity [Line Items]
Equity method investment, Impairments						$ 3,673,000
Number of Retail Properties \| property						3
IAGM Retail Fund I, LLC \| Rockwell Plaza \| Retail
Variable Interest Entity [Line Items]
Proceeds from the sale and transfer of investment properties, net					$ 20,500,000
Area of real estate property \| ft²					255
Equity method investment, Impairments					$ 1,443,000
Number of Retail Properties \| property						2
Losses on sales of investment real estate					559,000	$ 4,135,000
Unconsolidated Entities
Variable Interest Entity [Line Items]
Investment in unconsolidated entities					118,861,000	156,132,000
Unconsolidated Entities \| Downtown Railyard Venture, LLC
Variable Interest Entity [Line Items]
Investment in unconsolidated entities, impairment loss						29,933,000
Proceeds from divestiture		$ 30,000,000
Realized gain (loss) on disposal						0
Investment in unconsolidated entities					0	30,049,000
Unconsolidated Entities \| IAGM Retail Fund I, LLC
Variable Interest Entity [Line Items]
Number of retail properties contributed \| property									14
Proceeds from the sale and transfer of investment properties, net				$ 15,625,000
Amortization period							30 years
Aggregate deferred gain								$ 12,756,000
Investment in unconsolidated entities					118,861,000	$ 126,195,000
Senior Secured Term Loan \| IAGM Retail Fund I, LLC
Variable Interest Entity [Line Items]
Debt instrument, face amount			$ 152,000,000
Debt instrument, extension fee			0.10%
London Interbank Offered Rate (LIBOR) \| Senior Secured Term Loan \| IAGM Retail Fund I, LLC
Variable Interest Entity [Line Items]
Stated interest rate			1.55%
Subsequent Event \| Non Recourse, Mortgage Loan \| IAGM Retail Fund I, LLC
Variable Interest Entity [Line Items]
Debt extinguished	$ 14,872,000
Mortgages
Variable Interest Entity [Line Items]
Debt extinguished					$ 16,250,000