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Equity (Details 2) - USD ($)
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Class of Stock [Line Items]      
Common stock, shares authorized (in shares) 280,000,000   280,000,000
Preferred stock, shares authorized (in shares) 50,000,000   50,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period 1,902    
Common stock issued through the dividend reinvestment plan (in shares) 1,183 1,092  
Number of shares of stock grants withheld (in shares) 73,089 75,195  
Stock Issued During Period, Shares, Employee Stock Purchase Plans 8,686    
Stock issued during period, shares, share-based compensation, forfeited (in shares) 4,050    
Continuous Equity Program CEP V [Member]      
Class of Stock [Line Items]      
Maximum value of shares of common stock that can be sold (in dollars) $ 1,000,000,000    
Common stock value, remaining to be authorized under continuous equity program $ 752,878,000    
Maximum | Continuous Equity Program CEP V [Member]      
Class of Stock [Line Items]      
Percentage of compensation received by sales agent 1.50%    
Restricted Stock and Restricted Stock Converted From Performance Shares      
Class of Stock [Line Items]      
Equity instruments granted (in shares) 164,526 150,359