Quarterly report pursuant to Section 13 or 15(d)

Borrowings - Summary of Borrowings (Details)

v3.20.2
Borrowings - Summary of Borrowings (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Long-term debt $ 491,638 $ 481,929
Mortgage notes and bonds payable    
Debt Instrument [Line Items]    
Notes and bonds payable 494,662 484,949
Debt issuance costs – notes and bonds payable (3,124) (3,120)
Long-term debt 491,538 481,829
Notes payable to bank | Fixed-rate notes payable    
Debt Instrument [Line Items]    
Notes and bonds payable $ 404,531 394,569
Notes payable to bank | Fixed-rate notes payable | Minimum    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 3.00%  
Notes payable to bank | Fixed-rate notes payable | Maximum    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 5.70%  
Notes payable to bank | Fixed-rate notes payable | Weighted average    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 4.04%  
Bonds payable | Fixed-rate bonds payable    
Debt Instrument [Line Items]    
Notes and bonds payable $ 90,131 90,380
Bonds payable | Fixed-rate bonds payable | Minimum    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 2.61%  
Bonds payable | Fixed-rate bonds payable | Maximum    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 4.57%  
Bonds payable | Fixed-rate bonds payable | Weighted average    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 3.44%  
Line of credit | Variable-rate revolving lines of credit | Revolving credit facility    
Debt Instrument [Line Items]    
Long-term debt $ 100 $ 100
Stated interest rate (as percent) 3.39%