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Note 6 - Impairments - Asset Impairment Charges (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Asset Impairment Charges, Total |  | $ 6,624 | $ 48,743 | $ 79,207
Total net impairment charges | [1] | 6,600 | 48,700 | 79,200
Properties Marketed for Sale [Member] |  |  |  |
Asset Impairment Charges, Total | [2] | 5,500 | 12,500 | 59,500
Disposed Operating Properties [Member] |  |  |  |
Asset Impairment Charges, Total | [3] | $ 1,100 | $ 36,200 | $ 19,700
[1] | See Footnote 16 of the Notes to Consolidated Financial Statements for additional disclosure on fair value.
[2] | These impairment charges relate to adjustments to property carrying values for properties which the Company has marketed for sale as part of its capital recycling program and as such has adjusted the anticipated hold periods for such properties. During December 2018, the Company recognized an impairment charge of $41.0 million related to a development project located in Jacksonville, FL, which the Company had no longer intended to develop. The Company has sold portions of the property and is marketing the remainder of the property as is for sale.
[3] | Amounts relate to dispositions/deeds in lieu/foreclosures during the respective years shown.

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