LOANS - Allowance for Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	$ 29,956		$ 23,223
Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	29,956		23,223
Agricultural Finance
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	13,578	$ 11,369	10,511	$ 8,690	$ 7,104	$ 6,884
Agricultural Finance | Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	13,578		10,511
Farm & Ranch
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	6,635	5,071	5,132	4,676	4,535	3,936
Farm & Ranch | Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	6,635		5,132
Corporate AgFinance
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	6,943	6,298	5,379	4,014	2,569	2,948
Corporate AgFinance | Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	6,943		5,379
Infrastructure Finance loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	16,378	$ 13,687	12,712	$ 7,810	$ 7,184	$ 9,147
Infrastructure Finance loans | Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for Losses	$ 16,378		$ 12,712