FARMER MAC GUARANTEED SECURITIES AND USDA SECURITIES - Schedule of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
AgVantage
Weighted- Average Yield
Held-to-maturity, accrued interest excluded	$ 48,500	$ 59,800
Farmer Mac Guaranteed Securities and USDA Securities
Amortized Cost
Due within one year	590,175
Due after one year through five years	497,963
Due after five years through ten years	326,128
Due after ten years	2,667,643
Total, Amortized Cost	4,081,909
Fair Value
Due within one year	587,330
Due after one year through five years	498,841
Due after five years through ten years	302,526
Due after ten years	2,554,613
Total, Fair Value	$ 3,943,310
Weighted- Average Yield
Due within one year	3.58%
Due after one year through five years	4.61%
Due after five years through ten years	3.79%
Due after ten years	4.36%
Total, Weighted- Average Yield	4.28%