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Debt - 2021 Financings (Details) $ in Millions | Dec. 17, 2021 USD ($) community extensionOption | Mar. 20, 2020 USD ($) community | Sep. 09, 2020 USD ($) community | Aug. 31, 2020 USD ($) community | Mar. 31, 2020 USD ($) community | Mar. 19, 2020 USD ($) community | Jan. 31, 2020 USD ($) community
--- | --- | --- | --- | --- | --- | --- | ---
First Mortgage Financing |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt face amount |  |  | $ 156.5 | $ 191.3 | $ 73.1 |  |
First Mortgage Financing | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate basis | 2.15% |  |  |  |  |  |
Non-Recourse Supplemental Loan | First Mortgage Financing |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt face amount | $ 100.0 | $ 30.0 | $ 220.5 | $ 266.9 | $ 149.3 | $ 29.2 | $ 238.2
Number of options to extend | extensionOption | 2 |  |  |  |  |  |
Period of extension | 1 year | 1 year |  |  |  |  |
Non-Recourse First Mortgages | Secured Debt |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Number of communities securing debt | community | 11 | 1 | 27 | 16 | 18 | 7 | 14

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