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Equity - Narrative (Details)
 1 Months Ended 2 Months Ended 12 Months Ended
Dec. 31, 2018
$ / shares
shares
Sep. 30, 2020
USD ($)
$ / shares
Dec. 31, 2020
USD ($)
vote_per_share
$ / shares
shares
Dec. 31, 2019
USD ($)
$ / shares
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Mar. 01, 2021
USD ($)
Dividends Payable [Line Items]            
Common stock, shares authorized (in shares) | shares     400,000,000 400,000,000    
Common stock, par value (in dollars per share) | $ / shares     $ 0.01 $ 0.01    
Votes per common share | vote_per_share     1      
Value amount of shares authorized to be repurchased (up to) | $     $ 250,000,000      
Common stock repurchased | $     $ 10,000,000 $ 42,828,000 $ 32,182,000  
Preferred stock, shares authorized (in shares) | shares     10,000,000 10,000,000    
Preferred stock, par value (in dollars per share) | $ / shares     $ 0.01 $ 0.01    
Preferred stock, dividend rate     8.25%      
Liquidation preference per share (in dollars per share) | $ / shares   $ 25.00 $ 25.00 $ 25.00    
Preferred stock, redemption price (in dollars per share) | $ / shares   $ 25.00        
Limited partnership, price per unit (in dollars per share) | $ / shares $ 11.76       $ 11.76  
Option to redeem for common stock ratio 1   1      
Common Stock            
Dividends Payable [Line Items]            
Shares sold (in shares) | shares     10,680,856      
Shares sold, price per share (in dollars per share) | $ / shares     $ 8.23      
Net proceeds from shares sold | $     $ 87,900,000      
Placement fees and expenses | $     $ 1,100,000      
Series A Preferred Stock            
Dividends Payable [Line Items]            
Shares sold (in shares) | shares     4,760,000      
Placement fees and expenses | $   $ 4,500,000        
Preferred stock, dividend rate     8.25%      
Gross proceeds from sale of stock | $   $ 119,000,000.0        
Unaffiliated Third Parties            
Dividends Payable [Line Items]            
Common units issued (in shares) | shares 796,684       796,684  
Operating partnerships units held (in shares) | shares     855,191 792,131    
Common Stock            
Dividends Payable [Line Items]            
Aggregate offering price (up to) | $     $ 200,000,000      
Shares repurchased (in shares) | shares     1,119,438 4,428,947 3,384,359  
Repurchased shares, average price per share (in dollars per share) | $ / shares     $ 8.91      
Subsequent Event            
Dividends Payable [Line Items]            
Amount remaining under offering program | $           $ 112,100,000
Long-Term Incentive Plan Unit            
Dividends Payable [Line Items]            
Units outstanding (in shares) | shares 0   243,809 244,366 0