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Subsequent Events (Details) - Disposal Group, Disposed of by Sale, Not Discontinued Operations - Georgia Portfolio
$ in Millions
Apr. 07, 2017
USD ($)
ft²
buildings
Feb. 23, 2017
USD ($)
ft²
buildings
Subsequent Event [Line Items]    
Number of medical office buildings | buildings   4
Square feet of building being disposed | ft²   80,292
Proceeds from divestiture of businesses   $ 18.2
Subsequent Event    
Subsequent Event [Line Items]    
Number of medical office buildings | buildings 4  
Square feet of building being disposed | ft² 80,292  
Proceeds from divestiture of businesses $ 18.2  
Gain (loss) on sale of properties $ 5.5