LOANS - Allowance for Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	$ 35,340		$ 23,223
Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	35,340		23,223
Agricultural Finance
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	18,262	$ 13,578	10,511	$ 10,601	$ 8,690	$ 6,884
Agricultural Finance | Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	18,262		10,511
Farm & Ranch
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	11,134	6,635	5,132	4,832	4,676	3,936
Farm & Ranch | Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	11,134		5,132
Corporate AgFinance
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	7,128	6,943	5,379	5,769	4,014	2,948
Corporate AgFinance | Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	7,128		5,379
Infrastructure Finance loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	17,078	$ 16,378	12,712	$ 9,350	$ 7,810	$ 9,147
Infrastructure Finance loans | Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	$ 17,078		$ 12,712