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Concentration of Credit Risk - Schedule of Geographical Concentration of Credit Risk (Details) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Percentage of Total Company Revenues | Customer Concentration Risk | Life Science | Largest Tenant |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk (as a percent) | 2.00% |  |
Percentage of Total Company Revenues | Customer Concentration Risk | Medical Office | Largest Tenant |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk (as a percent) | 8.00% |  |
California | Percentage of Total Company Assets | Geographic Concentration Risk | Continuing Operations |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk (as a percent) | 37.00% | 34.00% |
California | Percentage of Total Company Revenues | Geographic Concentration Risk | Continuing Operations |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk (as a percent) | 31.00% | 28.00% | 21.00%
Florida | Percentage of Total Company Assets | Geographic Concentration Risk | Continuing Operations |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk (as a percent) | 10.00% | 11.00% |
Florida | Percentage of Total Company Revenues | Geographic Concentration Risk | Continuing Operations |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk (as a percent) | 18.00% | 17.00% | 14.00%
Texas | Percentage of Total Company Assets | Geographic Concentration Risk | Continuing Operations |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk (as a percent) | 10.00% | 10.00% |
Texas | Percentage of Total Company Revenues | Geographic Concentration Risk | Continuing Operations |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk (as a percent) | 11.00% | 11.00% | 9.00%
Massachusetts | Percentage of Total Company Assets | Geographic Concentration Risk | Continuing Operations |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk (as a percent) | 17.00% | 16.00% |
Massachusetts | Percentage of Total Company Revenues | Geographic Concentration Risk | Continuing Operations |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk (as a percent) | 10.00% | 9.00% | 4.00%

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