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Note 5 - Dispositions of Real Estate and Assets Held-for-sale (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Disposal Groups, Including Discontinued Operations [Table Text Block] |
|  | Year Ended December 31 , |
|  | 201 7 |  |  | 2016 |  |  | 2015 |
Aggregate sales price |  | $ | 352.2 |  |  | $ | 378.7 |  |  | $ | 492.5 |
Gain on sale, net of tax |  | $ | 93.5 |  |  | $ | 86.8 |  |  | $ | 143.6 |
Impairment charges |  | $ | 17.1 |  |  | $ | 37.2 |  |  | $ | 10.2 |
Number of operating properties sold |  |  | 25 |  |  |  | 30 |  |  |  | 89 |
Number of parcels/out-parcels sold |  |  | 9 |  |  |  | 2 |  |  |  | 8 |

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