LOANS - Allowance for Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 16,500		$ 16,031
Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	16,500		16,031
Agricultural Finance
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	8,690	$ 7,104	6,884	$ 11,302	$ 10,972	$ 6,775
Agricultural Finance | Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	8,690		6,884
Farm & Ranch
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	4,676	4,535	3,936	3,935	3,933	4,044
Farm & Ranch | Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	4,676		3,936
Corporate AgFinance
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	4,014	2,569	2,948	7,367	7,039	2,731
Corporate AgFinance | Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	4,014		2,948
Rural Infrastructure Finance loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	7,810	$ 7,184	9,147	$ 5,446	$ 4,701	$ 8,314
Rural Infrastructure Finance loans | Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 7,810		$ 9,147