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Real Estate - In-Place Lease Valuation and Tenant Origination and Absorption Costs (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Above Market Lease [Abstract] |  |
In-place lease valuation (above market) | $ 4,046 | $ 4,046
In-place lease valuation (above market), accumulated amortization | (1,215) | (1,123)
Intangible assets, net | 2,831 | 2,923
Below Market Lease, Net [Abstract] |  |
In-place lease valuation (below market) | (62,070) | (62,070)
In-place lease valuation (below market) - accumulated amortization | 17,091 | 15,841
In-place lease valuation (below market), net | (44,979) | (46,229)
Tenant Origination and Absorption Cost |  |
Finite-Lived Intangible Assets, Net [Abstract] |  |
Tenant origination and absorption cost | 240,364 | 240,364
Tenant origination and absorption cost - accumulated amortization | (77,331) | (71,364)
Tenant origination and absorption cost, net | $ 163,033 | $ 169,000

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