Quarterly report pursuant to Section 13 or 15(d)

Borrowings - Summary of Borrowings (Details)

v3.21.1
Borrowings - Summary of Borrowings (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Debt issuance costs – notes and bonds payable $ (3,600)  
Long-term debt 629,012 $ 624,061
Mortgage notes and bonds payable    
Debt Instrument [Line Items]    
Notes and bonds payable 632,519 627,590
Debt issuance costs – notes and bonds payable (3,607) (3,629)
Long-term debt 628,912 623,961
Notes payable to bank | Fixed-rate notes payable    
Debt Instrument [Line Items]    
Notes and bonds payable $ 536,015 492,182
Notes payable to bank | Fixed-rate notes payable | Minimum    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 2.45%  
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) 3.72%  
Notes payable to bank | Variable-rate notes payable    
Debt Instrument [Line Items]    
Notes and bonds payable $ 4,410 45,525
Notes payable to bank | Variable-rate notes payable | Minimum    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 2.11%  
Notes payable to bank | Variable-rate notes payable | Maximum    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 2.11%  
Notes payable to bank | Variable-rate notes payable | Weighted average    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 2.11%  
Bonds payable | Fixed-rate bonds payable    
Debt Instrument [Line Items]    
Notes and bonds payable $ 92,094 89,883
Bonds payable | Fixed-rate bonds payable | Minimum    
Debt Instrument [Line Items]    
Stated interest rate (as percent) 2.13%  
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) 3.49%  
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) 2.50%