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Investment in Consolidated and Unconsolidated Entities - Net Equity Investment and Share of Net Income (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Schedule of net equity investment and share of net income or loss
Carrying value of investment	$ 120,050	$ 156,132
IAGM Retail Fund I, LLC
Schedule of net equity investment and share of net income or loss
Ownership %	55.00%
Carrying value of investment	$ 120,050	126,195
Downtown Railyard Venture, LLC
Schedule of net equity investment and share of net income or loss
Ownership %	0.00%
Carrying value of investment	$ 0	30,049
Other unconsolidated entities
Schedule of net equity investment and share of net income or loss
Carrying value of investment	$ 0	$ (112)

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- Definition

Schedule of equity method investments.

+ References

No definition available.

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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