FARMER MAC GUARANTEED SECURITIES AND USDA SECURITIES - Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Unrealized loss position for less than 12 months
Unrealized loss position for less than 12 months, fair value	$ 733,941	$ 1,859,962
Unrealized loss position for less than 12 months, unrealized loss	(4,794)	(22,477)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, fair value	2,259,926	2,049,525
Unrealized loss position for more than 12 months, unrealized loss	(90,688)	(139,112)
Operating Segments
Unrealized loss position for less than 12 months
Unrealized loss position for less than 12 months, fair value	446,255	1,152,227
Unrealized loss position for less than 12 months, unrealized loss	(3,745)	(12,889)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, fair value	3,438,088	3,649,845
Unrealized loss position for more than 12 months, unrealized loss	(212,328)	(314,587)
Farmer Mac Guaranteed Securities and USDA Securities
Unrealized loss position for less than 12 months
Fair Value	588,063	1,038,050
Unrealized Loss	(3,345)	(4,019)
Unrealized loss position for more than 12 months
Fair Value	2,367,391	3,295,229
Unrealized Loss	(162,932)	(276,983)
USDA Securities
Unrealized loss position for less than 12 months
Fair Value	0	8,938
Unrealized Loss	0	(164)
Unrealized loss position for more than 12 months
Fair Value	1,789,302	2,099,695
Unrealized Loss	(157,186)	(258,026)
AgVantage | Farmer Mac Guaranteed Securities
Unrealized loss position for less than 12 months
Unrealized loss position for less than 12 months, fair value		1,152,227
Unrealized loss position for less than 12 months, unrealized loss		(12,889)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, fair value		3,649,845
Unrealized loss position for more than 12 months, unrealized loss		(314,587)
Unrealized loss position for less than 12 months
Fair Value	588,063	998,200
Unrealized Loss	(3,345)	(3,326)
Unrealized loss position for more than 12 months
Fair Value	539,729	1,187,464
Unrealized Loss	(5,230)	(18,266)
AgVantage | Farmer Mac Guaranteed Securities | Operating Segments
Unrealized loss position for less than 12 months
Unrealized loss position for less than 12 months, fair value	446,255
Unrealized loss position for less than 12 months, unrealized loss	(3,745)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, fair value	3,438,088
Unrealized loss position for more than 12 months, unrealized loss	(212,328)
USDA Securities | Farmer Mac Guaranteed Securities
Unrealized loss position for less than 12 months
Fair Value	0	30,912
Unrealized Loss	0	(529)
Unrealized loss position for more than 12 months
Fair Value	38,360	8,070
Unrealized Loss	$ (516)	$ (691)