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Real Estate - Real Estate Under Development and Construction in Progress - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2018 property
Cortlandt Crossing | Fund III |
Property, Plant and Equipment [Line Items] |
Number of projects put into service during period | 1
Core Portfolio |
Property, Plant and Equipment [Line Items] |
Number of projects put into service during period | 1

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- Details
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- Details
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