Investments in Unconsolidated Real Estate Funds - Summary of Cash Distributions Received from Funds (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Real Estate Investments, Net [Abstract]
Operating distributions received	$ 1,551	$ 1,506
Capital distributions received	2,225	1,953
Total distributions received	$ 3,776	$ 3,459

Proceeds from Equity Method Investment, Operating Distributions

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