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Real Estate Investments - Development and Improvement Projects (Details) - USD ($) | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Real estate investments |  |
Invested in projects | $ 13,071,000 |
Developments | Development and Improvement Commitments |  |
Real estate investments |  |
Invested in projects | 8,591,000 | $ 3,443,000
Improvements | Development and Improvement Commitments |  |
Real estate investments |  |
Invested in projects | 534,000 | 742,000
ALF | Developments | Development and Improvement Commitments |  |
Real estate investments |  |
Invested in projects | 6,803,000 | 2,941,000
ALF | Improvements | Development and Improvement Commitments |  |
Real estate investments |  |
Invested in projects | 122,000 | 41,000
SNF | Developments | Development and Improvement Commitments |  |
Real estate investments |  |
Invested in projects | 1,788,000 | 502,000
SNF | Improvements | Development and Improvement Commitments |  |
Real estate investments |  |
Invested in projects | 279,000 | $ 701,000
Other | Improvements | Development and Improvement Commitments |  |
Real estate investments |  |
Invested in projects | $ 133,000 |

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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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