Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

v3.19.2
Commitments and Contingencies (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Sep. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Jun. 28, 2018
Sep. 01, 2011
Loss Contingencies [Line Items]                
Debt instrument, interest rate. stated percentage   5.00%   5.00%        
Series D Preferred Stock                
Loss Contingencies [Line Items]                
Preferred stock, liquidation price per share (in dollars per share)   $ 25.00   $ 25.00   $ 25.00 $ 25.00  
Northeast                
Loss Contingencies [Line Items]                
Percentage accounted by properties of its annualized base rent   4.00%   4.00%        
Mid Atlantic                
Loss Contingencies [Line Items]                
Percentage accounted by properties of its annualized base rent   36.00%   36.00%        
Southeast                
Loss Contingencies [Line Items]                
Percentage accounted by properties of its annualized base rent   59.00%   59.00%        
Southwest                
Loss Contingencies [Line Items]                
Percentage accounted by properties of its annualized base rent   1.00%   1.00%        
Grove Economic Development Authority Tax Increment Revenue Note | Harbor Pointe Associates, LLC | Notes Payable, Other Payables | Guarantor Subsidiaries | Grove Economic Development Authority                
Loss Contingencies [Line Items]                
Debt issued               $ 2,415,000
Number of semi-annual payment installments               50
Guarantor obligations, maximum exposure amount               $ 2,260,000
Guarantor Obligations, Amount Funded   $ 44,000 $ 5,000 $ 44,000 $ 5,000      
Amounts accrued for guarantor obligations   $ 0   $ 0        
Minimum | Grove Economic Development Authority Tax Increment Revenue Note | Harbor Pointe Associates, LLC | Notes Payable, Other Payables | Guarantor Subsidiaries | Grove Economic Development Authority                
Loss Contingencies [Line Items]                
Debt instrument, interest rate. stated percentage               2.29%
Maximum | Grove Economic Development Authority Tax Increment Revenue Note | Harbor Pointe Associates, LLC | Notes Payable, Other Payables | Guarantor Subsidiaries | Grove Economic Development Authority                
Loss Contingencies [Line Items]                
Debt instrument, interest rate. stated percentage               14.00%
Guarantee of Indebtedness of Others                
Loss Contingencies [Line Items]                
Loss contingency, amount of damages sought $ 150,000