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Real Estate Investments - Purchase Price Allocation (Details) - 3000 Market Street [Member] $ in Thousands | Jul. 18, 2017 USD ($)
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Business Acquisition [Line Items] |  |
Building, land and improvements | $ 31,728 |
Intangible assets acquired | 2,838 | [1]
Below market lease liabilities assumed | (1,818) | [2]
Total purchase price | $ 32,748 |
[1] | Weighted average amortization period of 5.9 years.
[2] | Weighted average amortization period of 6.0 years.

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