LOANS - Allowance for Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 19,951		$ 16,031
Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	19,951		16,031
Agricultural Finance
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	10,601	$ 8,690	6,884	$ 7,588	$ 11,302	$ 6,775
Agricultural Finance | Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	10,601		6,884
Farm & Ranch
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	4,832	4,676	3,936	3,910	3,935	4,044
Farm & Ranch | Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	4,832		3,936
Corporate AgFinance
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	5,769	4,014	2,948	3,678	7,367	2,731
Corporate AgFinance | Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	5,769		2,948
Rural Infrastructure Finance loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	9,350	$ 7,810	9,147	$ 9,026	$ 5,446	$ 8,314
Rural Infrastructure Finance loans | Real Estate Loan
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	$ 9,350		$ 9,147