FARMER MAC GUARANTEED SECURITIES AND USDA SECURITIES - Schedule of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
AgVantage
Weighted- Average Yield
Available-for-sale, accrued interest excluded	$ 47,200	$ 51,500
Farmer Mac Guaranteed Securities
Amortized Cost
Due within one year	643,100
Due after one year through five years	2,801,674
Due after five years through ten years	1,425,000
Due after ten years	955,659
Available-for-sale, amortized cost	5,825,433
Fair Value
Due within one year	636,408
Due after one year through five years	2,706,830
Due after five years through ten years	1,343,146
Due after ten years	846,095
Total fair value	$ 5,532,479
Weighted- Average Yield
Due within one year	3.31%
Due after one year through five years	3.54%
Due after five years through ten years	3.75%
Due after ten years	3.55%
Weighted-average yield	3.56%