Annual report pursuant to Section 13 and 15(d)

Borrowings - Summary of Borrowings (Detail)

v3.20.4
Borrowings - Summary of Borrowings (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Sep. 30, 2020
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]        
Debt instrument, loans to value ratios percentage     60.00%  
Deferred financing costs related to mortgage notes and bonds payable     $ (3,600)  
Total borrowings, net     624,061 $ 481,929
Aggregate net book value     1,048,654  
Other income     1,872 $ 938
Notes and Bonds Borrowings        
Debt Instrument [Line Items]        
Aggregate net book value     $ 1,040,000  
Weighted average interest rate on borrowings (as percent)     3.95% 3.95%
Notes and bonds payable, net        
Debt Instrument [Line Items]        
Total borrowings, gross     $ 627,590 $ 484,949
Deferred financing costs related to mortgage notes and bonds payable     (3,629) (3,120)
Total borrowings, net     623,961 $ 481,829
Farm Credit Notes Payable        
Debt Instrument [Line Items]        
Reduction in interest rate (as percent)       20.40%
Reduction in basis points (as percent)   0.98%   0.98%
Other income $ 306 $ 1,300    
Notes payable to bank | Fixed-rate notes payable        
Debt Instrument [Line Items]        
Total borrowings, gross     $ 492,182 $ 394,569
Notes payable to bank | Fixed-rate notes payable | Minimum        
Debt Instrument [Line Items]        
Interest rate (as percent)     2.45%  
Notes payable to bank | Fixed-rate notes payable | Maximum        
Debt Instrument [Line Items]        
Interest rate (as percent)     5.70%  
Notes payable to bank | Fixed-rate notes payable | Weighted average        
Debt Instrument [Line Items]        
Interest rate (as percent)     3.78%  
Notes payable to bank | Variable-rate notes payable        
Debt Instrument [Line Items]        
Total borrowings, gross     $ 45,525 0
Notes payable to bank | Variable-rate notes payable | Minimum        
Debt Instrument [Line Items]        
Interest rate (as percent)     2.14%  
Notes payable to bank | Variable-rate notes payable | Maximum        
Debt Instrument [Line Items]        
Interest rate (as percent)     3.00%  
Notes payable to bank | Variable-rate notes payable | Weighted average        
Debt Instrument [Line Items]        
Interest rate (as percent)     2.18%  
Bonds payable | Fixed-rate bonds payable        
Debt Instrument [Line Items]        
Total borrowings, gross     $ 89,883 90,380
Bonds payable | Fixed-rate bonds payable | Minimum        
Debt Instrument [Line Items]        
Interest rate (as percent)     2.13%  
Bonds payable | Fixed-rate bonds payable | Maximum        
Debt Instrument [Line Items]        
Interest rate (as percent)     4.57%  
Bonds payable | Fixed-rate bonds payable | Weighted average        
Debt Instrument [Line Items]        
Interest rate (as percent)     3.50%  
Line of credit | Variable-rate revolving lines of credit | Revolving credit facility        
Debt Instrument [Line Items]        
Total borrowings, net     $ 100 $ 100
Line of credit | Variable-rate revolving lines of credit | Revolving credit facility | Weighted average        
Debt Instrument [Line Items]        
Interest rate (as percent)     2.50%