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Equity - Noncontrolling Interest (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 USD ($) item | Mar. 31, 2018 USD ($)
Noncontrolling interest |  |
Investment Commitment |  | $ 205,608,000
87-unit ALF and MC | 2017 Acquisitions | ALF and MC |  |
Noncontrolling interest |  |
Number of beds/units acquired | item | 87 |
Purchase Price | $ 10,000,000 |
Economic interest held (as a percent) | 90.00% |
110-unit ILF/ALF/MC | Wisconsin | 2017 Acquisitions | ALF/ILF/MC |  |
Noncontrolling interest |  |
Investment Commitment | $ 22,471,000 |
Number of beds/units under development | item | 110 |
Economic interest held (as a percent) | 90.00% |

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