Fair Value Measurements.

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- Definition

Investment Property, Measurement Input

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- Definition

Number Of Retail Properties Impaired

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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-Topic 230
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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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-Publisher FASB
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Value of input used to measure debt instrument, including, but not limited to, convertible and non-convertible debt.

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Fair Value Measurements - Narrative (Details)	12 Months Ended
Fair Value Measurements - Narrative (Details)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) property	Dec. 31, 2019 USD ($) property
Fair Value Measurements (Additional Textual) [Abstract]
Number of retail properties impaired \| property		1	1
Provision for asset impairment	$ 0	$ 9,002,000	$ 2,359,000
Discount Rate \| Line of Credit
Fair Value Measurements (Additional Textual) [Abstract]
Weighted average effective market interest rate	0.0239	0.0136
Weighted Average Effective Market rate \| Mortgages
Fair Value Measurements (Additional Textual) [Abstract]
Weighted average effective market interest rate	0.0444	0.0425
Unconsolidated Entities
Fair Value Measurements (Additional Textual) [Abstract]
Provision for asset impairment		$ 6,059,000
IAGM Retail Fund I, LLC
Fair Value Measurements (Additional Textual) [Abstract]
Number of retail properties impaired \| property		1
Provision for asset impairment		$ 11,016,000
Fair Value, Measurements, Recurring \| Level 1
Fair Value Measurements (Additional Textual) [Abstract]
Recurring fair value measurements	$ 0	0
Fair Value, Measurements, Recurring \| Level 3
Fair Value Measurements (Additional Textual) [Abstract]
Recurring fair value measurements	0	0
Fair Value, Measurements, Nonrecurring
Fair Value Measurements (Additional Textual) [Abstract]
Provision for asset impairment	0	$ 9,002,000	$ 2,359,000
Fair Value, Measurements, Nonrecurring \| IAGM Retail Fund I, LLC \| Real Estate \| Unconsolidated Entities \| Capitalization Rate
Fair Value Measurements (Additional Textual) [Abstract]
Investment property, measurement input		0.0850
Fair Value, Measurements, Nonrecurring \| IAGM Retail Fund I, LLC \| Real Estate \| Unconsolidated Entities \| Discount Rate
Fair Value Measurements (Additional Textual) [Abstract]
Investment property, measurement input		0.0950
Fair Value, Measurements, Nonrecurring \| Level 3
Fair Value Measurements (Additional Textual) [Abstract]
Recurring fair value measurements	$ 0