FARMER MAC GUARANTEED SECURITIES AND USDA SECURITIES - Schedule of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
AgVantage
Weighted- Average Yield
Available-for-sale, accrued interest excluded	$ 59,800	$ 47,200
Farmer Mac Guaranteed Securities
Amortized Cost
Due within one year	596,516
Due after one year through five years	3,255,116
Due after five years through ten years	950,000
Due after ten years	1,137,636
Available-for-sale, amortized cost	5,939,268
Fair Value
Due within one year	593,048
Due after one year through five years	3,213,655
Due after five years through ten years	902,642
Due after ten years	1,052,346
Total fair value	$ 5,761,691
Weighted- Average Yield
Due within one year	3.58%
Due after one year through five years	3.82%
Due after five years through ten years	3.60%
Due after ten years	3.82%
Weighted-average yield	3.75%