Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

v3.19.1
Commitments and Contingencies (Details) - USD ($)
1 Months Ended
Apr. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Jun. 28, 2018
Sep. 01, 2011
Loss Contingencies [Line Items]          
Debt instrument, interest rate. stated percentage   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  
Northeast          
Loss Contingencies [Line Items]          
Percentage accounted by properties of its annualized base rent   4.00%      
Mid Atlantic          
Loss Contingencies [Line Items]          
Percentage accounted by properties of its annualized base rent   19.00%      
Southeast          
Loss Contingencies [Line Items]          
Percentage accounted by properties of its annualized base rent   76.00%      
Southwest          
Loss Contingencies [Line Items]          
Percentage accounted by properties of its annualized base rent   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         $ 2,280,000
Amounts accrued for guarantor obligations   $ 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 | Subsequent Event          
Loss Contingencies [Line Items]          
Loss contingency, amount of damages sought $ 21,000,000        
Guarantee of Indebtedness of Others | Subsequent Event | Guarantor Subsidiaries          
Loss Contingencies [Line Items]          
Loss contingency, amount of damages sought 0        
Guarantee of Indebtedness of Others | Subsequent Event | Guarantor Subsidiaries | WD-I Associates          
Loss Contingencies [Line Items]          
First loan amount in default 11,000,000        
Second loan amount in default $ 1,000,000