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Real Estate - Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Real Estate [Line Items]
Restricted cash	$ 33,451	$ 15,807
Real Estate Asset Acquisitions and Contributions
Real Estate [Line Items]
Restricted cash	33,451	15,807
Real Estate Asset Acquisitions and Contributions | Cash reserves
Real Estate [Line Items]
Restricted cash	27,535	12,945
Real Estate Asset Acquisitions and Contributions | Restricted lockbox
Real Estate [Line Items]
Restricted cash	$ 5,916	$ 2,862

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Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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