Quarterly report pursuant to Section 13 or 15(d)

Borrowings - Summary of Borrowings (Details)

v3.8.0.1
Borrowings - Summary of Borrowings (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Debt Instrument [Line Items]    
Total borrowings, net $ 292,950 $ 301,002
Mortgage notes and bonds payable    
Debt Instrument [Line Items]    
Total mortgage notes and bonds payable 291,130 292,988
Debt issuance costs – mortgage notes and bonds payable (2,080) (1,986)
Total borrowings, net 289,050 291,002
Notes payable to bank | Fixed-rate mortgage notes payable    
Debt Instrument [Line Items]    
Total mortgage notes and bonds payable $ 205,579 208,469
Notes payable to bank | Fixed-rate mortgage notes payable | Minimum    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 3.16%  
Notes payable to bank | Fixed-rate mortgage notes payable | Maximum    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 4.70%  
Notes payable to bank | Fixed-rate mortgage notes payable | Weighted average    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 3.62%  
Bonds payable | Fixed-rate bonds payable    
Debt Instrument [Line Items]    
Total mortgage notes and bonds payable $ 85,551 84,519
Bonds payable | Fixed-rate bonds payable | Minimum    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 2.38%  
Bonds payable | Fixed-rate bonds payable | Maximum    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 4.47%  
Bonds payable | Fixed-rate bonds payable | Weighted average    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 3.15%  
MetLife Lines of Credit | Variable-rate revolving lines of credit | Revolving credit facility    
Debt Instrument [Line Items]    
Total borrowings, net $ 3,900 $ 10,000
Stated interest rate (as percent) 3.95%