v3.26.3
BORROWINGS - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Apr. 27, 2026
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2025
Debt Instrument [Line Items]              
Net cost basis   $ 1,115,387,000   $ 1,115,387,000      
Borrowings under lines of credit   37,100,000   37,100,000     $ 200,000
Expected reclassification as reduction to interest expense       1,800,000      
Borrowings              
Debt Instrument [Line Items]              
Net cost basis   $ 945,000,000.0   $ 945,000,000.0      
Weighted average interest rate   3.96% 3.81% 3.87% 3.80%    
Farm Credit Notes Payable              
Debt Instrument [Line Items]              
Reduction in interest rate             21.00%
Reduction in basis points         0.95% 1.01% 0.95%
Debt eligible for interest patronage   $ 135,700,000   $ 135,700,000     $ 144,900,000
MetLife Lines of Credit | Line of Credit              
Debt Instrument [Line Items]              
Face amount of debt   75,000,000   $ 75,000,000      
Less variable rate       (2.00%)      
2020 MetLife Term Note | Notes and Bonds Payables              
Debt Instrument [Line Items]              
Face amount of debt   75,000,000   $ 75,000,000      
2022 MetLife Term Note | Notes and Bonds Payables              
Debt Instrument [Line Items]              
Face amount of debt   100,000,000.0   100,000,000.0      
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   22,000,000.0   $ 22,000,000.0      
Farm Credit Facility | Line of Credit              
Debt Instrument [Line Items]              
Maximum borrowing capacity $ 37,000,000.0            
Less variable rate 0.50%            
Commitment fee percentage 0.15%            
Borrowings under lines of credit   0   0      
Remaining borrowing capacity $ 37,000,000.0            
Mortgage Notes and Bonds Payable | Fair Value              
Debt Instrument [Line Items]              
Debt, fair value   437,600,000   437,600,000      
Mortgage Notes and Bonds Payable | Carrying Value              
Debt Instrument [Line Items]              
Debt, fair value   455,600,000   455,600,000      
Variable-Rate Line of Credit | Fair Value              
Debt Instrument [Line Items]              
Debt, fair value   37,100,000   37,100,000      
Variable-Rate Line of Credit | Carrying Value              
Debt Instrument [Line Items]              
Debt, fair value   $ 37,100,000   $ 37,100,000