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Real Estate Investments, Net - Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas (Details) | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
United States |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Entity-wide revenue percentage | 55.80% | 55.70%
Michigan |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Entity-wide revenue percentage | 13.70% | 13.70%
United Kingdom |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Entity-wide revenue percentage | 19.40% | 19.00%

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- Definition Entity Wide Revenue, Major State, Percentage + References No definition available. + Details
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Data Type: | num:percentItemType
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Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
Name: | srt_StatementGeographicalAxis=stpr_MI
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Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_StatementGeographicalAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |