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Gain on Sales of Real Estate
 9 Months Ended
Sep. 30, 2019
Gain (Loss) on Sale of Investments [Abstract]  
Gain of Sales of Real Estate Gain on Sales of Real Estate

The following table summarizes our properties sold during the periods indicated below (dollars in millions):
 
Three Months Ended September 30,
 
 
Nine Months Ended September 30,
 
 
2019

 
2018

 
2019

 
2018

Number of properties
27

 
20

 
64

 
60

Net sales proceeds
$
21.5

 
$
35.5

 
$
72.6

 
$
83.0

Gain on sales of real estate
$
1.7

 
$
7.8

 
$
15.8

 
$
18.8