Investment in Unconsolidated Entities - Narrative (Details)	12 Months Ended
Dec. 31, 2020 USD ($) derivative_instrument property unconsolidated_entity	Dec. 31, 2021 unconsolidated_entity
Interest Rate Swap
Variable Interest Entity [Line Items]
Derivative liability	$ 291,000
Retail
Variable Interest Entity [Line Items]
Equity method investment, Impairments	$ 6,059,000
IAGM Retail Fund I, LLC \| Interest Rate Swap
Variable Interest Entity [Line Items]
Number of derivatives held \| derivative_instrument	2
Derivative liability	$ 530,000
IAGM Retail Fund I, LLC \| Interest Rate Swap, Effective Date April 1, 2020, 1.979% Fixed Interest
Variable Interest Entity [Line Items]
Notional amount	$ 45,000,000
Fixed interest rate	1.979%
IAGM Retail Fund I, LLC \| Interest Rate Swap, Effective Date April 1, 2020, 1.956% Fixed Interest
Variable Interest Entity [Line Items]
Notional amount	$ 30,000,000
Fixed interest rate	1.956%
IAGM Retail Fund I, LLC \| Retail
Variable Interest Entity [Line Items]
Number of retail properties \| property	1
IAGM Retail Fund I, LLC
Variable Interest Entity [Line Items]
Ownership percentage	55.00%	55.00%
Number of equity method investments \| unconsolidated_entity	1	1
IAGM Retail Fund I, LLC \| Retail
Variable Interest Entity [Line Items]
Equity method investment, Impairments	$ 11,016,000

Equity Method Investment, Summarized Financial Information, Impairments

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Fixed interest rate related to the interest rate derivative.

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Nominal or face amount used to calculate payment on derivative.

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The number of derivative instruments of a particular group held by the entity.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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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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