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Note 8 - Other Real Estate Investments (Details Textual) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Equity Method Investments | $ 590,700 | $ 578,100
Secured Debt, Total | 311,272 | 484,008
Preferred Equity Investments [Member] |  |
Equity Method Investments | $ 98,200 | $ 175,300
Number of Real Estate Properties | 113 | 240
Income (Loss) from Equity Method Investments, Total | $ 28,400 | $ 25,800
Equity Method Investment, Realized Gain (Loss) on Disposal, Total | $ 13,700 | $ 7,300
Preferred Equity Investments [Member] | Minimum [Member] |  |
Debt Instrument, Term (Month) | 1 month |
Debt Instrument, Interest Rate, Stated Percentage | 4.19% |
Preferred Equity Investments [Member] | Maximum [Member] |  |
Debt Instrument, Term (Month) | 4 years |
Debt Instrument, Interest Rate, Stated Percentage | 9.85% |
Preferred Equity Investments [Member] | Leased Properties [Member] |  |
Number of Real Estate Properties | 103 | 230
Preferred Equity Investment [Member] |  |
Secured Debt, Total | $ 141,900 |
Long-term Debt, Fair Value | 4,800 |
Preferred Equity Investment [Member] | Property in Queens, NY [Member] |  |
Equity Method Investments | $ 10,100 |
Equity Method Investment, Ownership Percentage | 71.43% |

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