LOANS - Changes in the Allowance for Losses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	$ 16,031,000
Provision for/(release of) losses	11,579,000	$ 858,000	$ 1,323,000
Ending balance	23,223,000	16,031,000
Total Agricultural Finance loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	6,884,000	6,775,000	3,442,000
Provision for/(release of) losses	8,125,000	109,000	3,417,000
Charge-offs	(4,498,000)	0	(84,000)
Ending balance	10,511,000	6,884,000	6,775,000
Farm & Ranch
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	3,936,000	4,044,000	2,882,000
Provision for/(release of) losses	1,297,000	(108,000)	1,246,000
Charge-offs	(101,000)	0	(84,000)
Ending balance	5,132,000	3,936,000	4,044,000
Farm & Ranch | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision for/(release of) losses	1,200,000	1,000,000	1,900,000
Corporate AgFinance
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	2,948,000	2,731,000	560,000
Provision for/(release of) losses	6,828,000	217,000	2,171,000
Charge-offs	(4,397,000)	0	0
Ending balance	5,379,000	2,948,000	2,731,000
Corporate AgFinance | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision for/(release of) losses	1,000,000	0	2,400,000
Infrastructure Finance loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	9,147,000	8,314,000	10,599,000
Provision for/(release of) losses	3,565,000	833,000	(2,285,000)
Charge-offs	0	0	0
Ending balance	12,712,000	9,147,000	8,314,000
Infrastructure Finance loans | Collateral Pledged
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision for/(release of) losses	$ 0	$ 0	$ 0