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Real Estate Held for Sale in Consolidated VIEs (Details) - USD ($)	1 Months Ended		12 Months Ended
	Feb. 28, 2019	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Investment [Line Items]
Real estate held for sale before accumulated depreciation and amortization				$ 0	$ 29,704,000
Riverchase Landing | VIE, Primary Beneficiary
Investment [Line Items]
Gains on sales of investment real estate		$ 2,300,000
Land					2,650,000
Building and improvements					26,032,000
Furniture, fixtures and equipment					974,000
Lease intangible					2,802,000
Real estate held for sale before accumulated depreciation and amortization					32,458,000
Accumulated depreciation					(418,000)
Accumulated amortization of lease intangible					(2,336,000)
Real estate held for sale in consolidated variable interest entities				$ 0	$ 29,704,000
Depreciation			$ 600,000
Amortization			$ 3,100,000
The Clusters | VIE, Primary Beneficiary
Investment [Line Items]
Gains on sales of investment real estate	$ 1,600,000

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

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Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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