Quarterly report pursuant to Section 13 or 15(d)

Borrowings - Additional Information (Details)

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Borrowings - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2024
Mar. 31, 2024
Sep. 30, 2023
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Feb. 03, 2022
Feb. 02, 2022
Debt Instrument [Line Items]                  
Net cost basis $ 1,271,852,000       $ 1,271,852,000        
Other income 497,000     $ 364,000 2,925,000 $ 2,984,000      
Borrowings under lines of credit 200,000       200,000   $ 200,000    
Expected reclassification as reduction to interest expense         2,300,000        
Notes and Bonds Payables                  
Debt Instrument [Line Items]                  
Repayments of maturing loans         16,200,000        
Borrowings                  
Debt Instrument [Line Items]                  
Net cost basis $ 1,100,000,000       $ 1,100,000,000        
Weighted average interest rate 3.83%     3.79% 3.82% 3.78%      
Farm Credit Notes Payable                  
Debt Instrument [Line Items]                  
Reduction in interest rate             22.00%    
Reduction in basis points             1.01%    
Other income   $ 1,900,000 $ 111,000            
Farm Credit Notes Payable | Notes and Bonds Payables | Weighted average                  
Debt Instrument [Line Items]                  
Interest rate, stated percentage 3.15%       3.15%        
2020 MetLife Term Note | Notes and Bonds Payables                  
Debt Instrument [Line Items]                  
Face amount of debt $ 75,000,000       $ 75,000,000       $ 75,000,000
Interest rate, stated percentage 2.75%       2.75%        
MetLife Lines of Credit | Notes and Bonds Payables                  
Debt Instrument [Line Items]                  
Face amount of debt               $ 100,000,000  
MetLife Lines of Credit | Line of Credit                  
Debt Instrument [Line Items]                  
Face amount of debt $ 75,000,000       $ 75,000,000     $ 75,000,000  
Farmer Mac Facility                  
Debt Instrument [Line Items]                  
Face amount of debt 225,000,000.0       $ 225,000,000.0        
Debt instrument, term         10 years        
Secured debt 36,300,000       $ 36,300,000        
Mortgage Notes and Bonds Payable | Notes and Bonds Payables                  
Debt Instrument [Line Items]                  
Secured debt 551,900,000       551,900,000        
Fair value amount 503,000,000.0       503,000,000.0        
Short Term Mortgage Notes And Bonds Payable | Notes and Bonds Payables                  
Debt Instrument [Line Items]                  
Borrowings under lines of credit $ 200,000       $ 200,000