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 12 Months Ended
Mar. 31, 2024
Sep. 30, 2023
Mar. 31, 2023
Dec. 31, 2023
Feb. 03, 2022
Feb. 02, 2022
Debt Instrument [Line Items]            
Net cost basis $ 1,279,958,000          
Other income 2,428,000   $ 2,620,000      
Borrowings under lines of credit 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          
Weighted average interest rate 3.81%   3.77%      
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%          
2020 MetLife Term Note | Notes and Bonds Payables            
Debt Instrument [Line Items]            
Face amount of debt $ 75,000,000         $ 75,000,000
Interest rate, stated percentage 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  
Farmer Mac Facility            
Debt Instrument [Line Items]            
Face amount of debt $ 225,000,000          
Debt instrument, term 10 years          
Secured debt $ 36,300,000          
Mortgage Notes and Bonds Payable | Notes and Bonds Payables            
Debt Instrument [Line Items]            
Secured debt 554,800,000          
Fair value amount 506,800,000          
Short Term Mortgage Notes And Bonds Payable | Notes and Bonds Payables            
Debt Instrument [Line Items]            
Borrowings under lines of credit $ 200,000