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Note 4 - Investments In and Advances to Real Estate Joint Ventures - Joint Venture Investments Accounted for Under the Equity Method, Debt Details (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Mortgage and notes payable |  | $ 1,603.1 | $ 1,638.7
Prudential Investment Program [Member] |  |  |
Mortgage and notes payable |  | $ 416.0 | $ 426.9
Weighted average interest rate |  | 2.30% | 2.02%
Weighted average remaining term (Month) | [1] | 43 months | 45 months 18 days
KIR [Member] |  |  |
Mortgage and notes payable |  | $ 468.7 | $ 492.6
Weighted average interest rate |  | 2.74% | 2.55%
Weighted average remaining term (Month) | [1] | 25 months 3 days | 27 months 27 days
CPP [Member] |  |  |
Mortgage and notes payable |  | $ 83.9 | $ 84.2
Weighted average interest rate |  | 2.20% | 1.85%
Weighted average remaining term (Month) | [1] | 52 months 3 days | 55 months
Other Institutional Joint Ventures [Member] |  |  |
Mortgage and notes payable |  | $ 233.0 | $ 232.9
Weighted average interest rate |  | 2.00% | 1.65%
Weighted average remaining term (Month) | [1] | 56 months 21 days | 59 months 21 days
Other Joint Venture Programs [Member] |  |  |
Mortgage and notes payable |  | $ 401.5 | $ 402.1
Weighted average interest rate |  | 3.63% | 3.58%
Weighted average remaining term (Month) | [1] | 80 months 3 days | 83 months
[1] | Includes extension options

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