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Note 6 - Other Investments (Details Textual) - Preferred Equity Investments [Member]
$ in Millions
9 Months Ended
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Equity Method Investments $ 69.6  
Number of Real Estate Properties 13  
Income (Loss) from Equity Method Investments $ 14.8 $ 8.5