FARMER MAC GUARANTEED SECURITIES AND USDA SECURITIES - Schedule of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
AgVantage
Weighted- Average Yield
Held-to-maturity, accrued interest excluded	$ 51,600	$ 67,400
Farmer Mac Guaranteed Securities and USDA Securities
Amortized Cost
Due within one year	1,184,967
Due after one year through five years	1,172,821
Due after five years through ten years	290,568
Due after ten years	2,656,741
Total, Amortized Cost	5,305,097
Fair Value
Due within one year	1,178,075
Due after one year through five years	1,158,934
Due after five years through ten years	262,229
Due after ten years	2,456,386
Total, Fair Value	$ 5,055,624
Weighted- Average Yield
Due within one year	5.16%
Due after one year through five years	4.64%
Due after five years through ten years	3.70%
Due after ten years	4.36%
Total, Weighted- Average Yield	4.61%