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Stockholders' Equity / Partners' Capital Narrative (Details)
$ / shares in Units, $ in Millions
 12 Months Ended
May 22, 2020
USD ($)
yr
Dec. 31, 2020
$ / shares
shares
Dec. 31, 2019
$ / shares
shares
Mar. 27, 2018
$ / shares
Jun. 02, 2017
USD ($)
Class of Stock [Line Items]          
Common Stock, Shares, Outstanding   155,718,825 154,790,298    
General Partners' Capital Account, Units Outstanding (in units)   1,730,921      
Limited Partners' Capital Account, Units Outstanding (in units)   153,987,904      
Options exercised   43,792 145,088    
Shares of Common Stock issued in connection with redemption of an equal number of OP Units (in shares)   856,811 144,481    
ATM Program [Member]          
Class of Stock [Line Items]          
At The Market Stock Offering Program Aggregate Value Of Common Stock | $ $ 600.0       $ 600.0
At Market Stock Offering Program Maximum Length Of Sale (in years) | yr 3        
Series B Cumulative Redeemable Preferred Stock / Unit [Member]          
Class of Stock [Line Items]          
Series B, Shares Outstanding (in shares)   80,000 80,000    
Series B, Dividend Rate, Percentage   5.25% 5.25%    
Series B, Liquidation Preference Per Share (dollars per share) | $ / shares   $ 2,500.00 $ 2,500 $ 2,500.00  
Depositary shares of Series B Cumulative Redeemable Preferred [Member]          
Class of Stock [Line Items]          
Series B, Shares Outstanding (in shares)   8,000,000 8,000,000    
Series B, Liquidation Preference Per Share (dollars per share) | $ / shares   $ 25.00   $ 25.00