Quarterly report [Sections 13 or 15(d)]

BORROWINGS - Narrative (Details)

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BORROWINGS - Narrative (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Apr. 27, 2026
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Debt Instrument [Line Items]            
Net cost basis   $ 1,129,622,000   $ 1,129,622,000    
Borrowings under lines of credit   21,100,000   21,100,000   $ 200,000
Expected reclassification as reduction to interest expense       1,500,000    
Borrowings            
Debt Instrument [Line Items]            
Net cost basis   $ 959,400,000   $ 959,400,000    
Weighted average interest rate   3.83% 3.81% 3.82% 3.80%  
Farm Credit Notes Payable            
Debt Instrument [Line Items]            
Reduction in interest rate           21.00%
Reduction in basis points         0.95% 0.95%
Debt eligible for interest patronage   $ 142,300,000   $ 142,300,000   $ 144,900,000
MetLife Lines of Credit | Line of Credit            
Debt Instrument [Line Items]            
Face amount of debt   75,000,000.0   $ 75,000,000.0    
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   22,200,000   $ 22,200,000    
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   449,300,000   449,300,000    
Mortgage Notes and Bonds Payable | Carrying Value            
Debt Instrument [Line Items]            
Debt, fair value   466,700,000   466,700,000    
Variable-Rate Line of Credit | Fair Value            
Debt Instrument [Line Items]            
Debt, fair value   21,100,000   21,100,000    
Variable-Rate Line of Credit | Carrying Value            
Debt Instrument [Line Items]            
Debt, fair value   $ 21,100,000   $ 21,100,000