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Equity - Narrative (Details)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Aug. 06, 2019
USD ($)
$ / shares
shares
Jun. 30, 2019
USD ($)
$ / shares
shares
Mar. 31, 2019
shares
Jun. 30, 2019
USD ($)
vote
$ / shares
shares
Jun. 30, 2018
USD ($)
Dec. 31, 2018
$ / shares
shares
Class of Stock [Line Items]            
Common stock, shares authorized (up to) (in shares)   400,000,000   400,000,000   400,000,000
Common stock, par value (in dollars per share) | $ / shares   $ 0.01   $ 0.01   $ 0.01
Votes per common share | vote       1    
Value amount of shares authorized to be repurchased (up to) | $   $ 250,000,000.0   $ 250,000,000.0    
Shares repurchased (in shares)   1,004,589   4,148,511    
Repurchased shares, average price per share (in dollars per share) | $ / shares   $ 9.95   $ 9.63    
Common stock repurchased | $   $ 10,000,000.0   $ 40,030,000 $ 0  
Preferred stock, shares authorized (up to) (in shares)   10,000,000   10,000,000   10,000,000
Preferred stock, par value (in dollars per share) | $ / shares   $ 0.01   $ 0.01   $ 0.01
Preferred stock, shares outstanding (in shares)   0   0   0
Limited partnership, price per unit (in dollars per unit) | $ / shares           $ 11.76
Option to redeem for common stock ratio           1
Common Stock            
Class of Stock [Line Items]            
Aggregate offering price (up to) | $       $ 200,000,000    
Shares repurchased (in shares)   1,004,589 3,143,922      
Unaffiliated Third Parties            
Class of Stock [Line Items]            
Common units issued (in shares)           796,684
Operating partnerships units held (in shares)   796,684   796,684    
Subsequent Event            
Class of Stock [Line Items]            
Shares repurchased (in shares) 280,436          
Repurchased shares, average price per share (in dollars per share) | $ / shares $ 9.96          
Common stock repurchased | $ $ 2,800,000          
Remaining authorized repurchase amount | $ $ 175,200,000