LOANS - Summary of Changes in Allowance for Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	$ 47,167	$ 29,956	$ 37,785	$ 23,223
Provision for losses	9,420	7,578	20,773	17,028
Charge-offs	(8,262)	(4,423)	(10,479)	(7,263)
Recovery	0	2,229	246	2,352
Ending balance	48,325	35,340	48,325	35,340
Total Agricultural Finance loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Charge-offs			(8,300)
Agricultural Finance - Farm & Ranch loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	15,472	6,635	9,400	5,132
Provision for losses	364	4,067	6,478	8,410
Charge-offs	(41)	(1,243)	(83)	(4,083)
Recovery	0	1,675	0	1,675
Ending balance	15,795	11,134	15,795	11,134
Agricultural Finance - Farm & Ranch loans | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision for losses			7,300	2,300
Corporate AgFinance
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	7,211	6,943	6,631	5,379
Provision for losses	1,391	2,811	3,900	4,252
Charge-offs	0	(3,180)	(2,175)	(3,180)
Recovery	0	554	246	677
Ending balance	8,602	7,128	8,602	7,128
Corporate AgFinance | Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision for losses			0	1,000
Infrastructure Finance loans
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	24,484	16,378	21,754	12,712
Provision for losses	7,665	700	10,395	4,366
Charge-offs	(8,221)	0	(8,221)	0
Recovery	0	0	0	0
Ending balance	$ 23,928	$ 17,078	23,928	$ 17,078
Infrastructure Finance loans | Collateral Pledged
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision for losses			$ 0