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Commitments and Contingencies - Construction Activity (Details) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 USD ($) | Sep. 30, 2023 ft² | Jun. 30, 2022 USD ($) ft² property
Other Commitments [Line Items] |  |  |
Number of real estate properties | property |  |  | 255
Medical office building | Dallas, TX |  |  |
Other Commitments [Line Items] |  |  |
Square footage of building under redevelopment |  |  | 217,114
Construction activity, total funding to date | $ |  |  | $ 10.2
Medical office building | Tacoma, WA |  |  |
Other Commitments [Line Items] |  |  |
Construction activity, total funding to date | $ |  |  | $ 9.5
Approximate square feet |  |  | 23,000
Medical office building | Nashville, TN |  |  |
Other Commitments [Line Items] |  |  |
Construction activity, total funding to date | $ |  |  | $ 7.4
Square footage of building to be demolished |  |  | 81,000
Impairment charge | $ | $ 5.0 |  |
Medical office building | Nashville, TN | Forecast |  |  |
Other Commitments [Line Items] |  |  |
Approximate square feet |  | 106,194 |
Medical office building | Washinton, DC |  |  |
Other Commitments [Line Items] |  |  |
Square footage of building under redevelopment |  |  | 158,338
Number of real estate properties | property |  |  | 2
Medical office building | Denver, CO |  |  |
Other Commitments [Line Items] |  |  |
Square footage of building under redevelopment |  |  | 93,992
Medical office building 2 | Dallas, TX |  |  |
Other Commitments [Line Items] |  |  |
Square footage of building under redevelopment |  |  | 145,365
Construction activity, total funding to date | $ |  |  | $ 0.6
Medical office building 2 | Washinton, DC |  |  |
Other Commitments [Line Items] |  |  |
Construction activity, total funding to date | $ |  |  | $ 0.1

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