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Note 5 - Investments In and Advances to Real Estate Joint Ventures - The Company's Share of Net Income/(Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Prudential Investment Program [Member] |  |  |  |
Income of joint ventures, net | $ 1,900 | $ 2,300 | $ 7,200 | $ 6,800
KIR [Member] |  |  |  |
Income of joint ventures, net | 9,400 | 8,200 | 27,200 | 22,900
CPP [Member] |  |  |  |
Income of joint ventures, net | 2,600 | 900 | 6,700 | 3,600
Other Institutional Joint Ventures [Member] |  |  |  |
Income of joint ventures, net | 900 | 0 | 900 | 0
Other Joint Venture Programs [Member] |  |  |  |
Income of joint ventures, net | 5,200 | (200) | 12,100 | 1,700
Joint Ventures [Member] |  |  |  |
Income of joint ventures, net | $ 20,025 | $ 11,233 | $ 54,095 | $ 35,039

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