Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

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Stockholders' Equity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Aug. 17, 2018
Sep. 30, 2018
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Preferred Stock, Shares Authorized   10,000 10,000   10,000
Preferred Stock, Par or Stated Value Per Share   $ 0.001 $ 0.001   $ 0.001
Preferred Stock, Shares Issued   3,105 3,105   3,105
Common Stock, Shares Authorized   500,000 500,000   500,000
Common Stock, Par or Stated Value Per Share   $ 0.001 $ 0.001   $ 0.001
Common Stock, Shares, Outstanding   22,003 22,003   21,631
Dividends Payable   $ 6,109 $ 6,109   $ 5,638
Preferred Stock, Liquidation Preference Per Share   $ 25 $ 25    
Payments of Ordinary Dividends, Preferred Stock and Preference Stock     $ 4,366    
Limited Partners' Capital Account, Units Issued   1,857 1,857   1,246
Payments of dividens, Common Stock, OP and LTIP Units     $ (14,075) $ (10,815)  
Partners' Capital Account, Units, Sale of Units     611   1,246
Noncontrolling Interest, Increase from Subsidiary Equity Issuance     $ 4,742   $ 11,532
Limited Partners' Capital Account   $ 16,274 16,274   11,532
Proceeds from Issuance of Common Stock     3,209 33,795  
Stock To Be Issued During Period Value ATM Offering $ 50,000        
Stock Issued During Period, Value, New Issues     3,452    
At The Market [Member]          
Proceeds from Issuance of Common Stock $ 3,209        
Deferred Offering Costs   59 59    
Commission On Sale Of Stock   $ 53      
Stock Issued During Period, Shares, New Issues   372      
Stock Issued During Period, Value, New Issues   $ 3,505      
Payments of Stock Issuance Costs   243      
Common Stock [Member]          
Dividends Payable   $ 180 180 $ 92  
Payments of Ordinary Dividends     46    
Noncontrolling Interest, Increase from Subsidiary Equity Issuance     $ 0    
Stock Issued During Period, Shares, New Issues     372    
Stock Issued During Period, Value, New Issues     $ 0    
Series A Preferred Stock [Member]          
Preferred Stock, Shares Issued   3,105 3,105    
Dividends Payable, Amount Per Share   $ 1,875 $ 1,875    
Preferred Stock, Liquidation Preference Per Share   $ 25 $ 25    
Preferred Stock, Dividend Rate, Percentage     7.50%    
Long Tem Incentives Plan Units [Member]          
Dividends Payable   $ 250 $ 250   $ 116