FARMER MAC GUARANTEED SECURITIES AND USDA SECURITIES - Schedule of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
AgVantage
Weighted- Average Yield
Available-for-sale, accrued interest excluded	$ 57,900	$ 47,200
Farmer Mac Guaranteed Securities
Amortized Cost
Due within one year	850,000
Due after one year through five years	2,811,653
Due after five years through ten years	1,200,000
Due after ten years	949,649
Available-for-sale, amortized cost	5,811,302
Fair Value
Due within one year	838,515
Due after one year through five years	2,701,597
Due after five years through ten years	1,105,537
Due after ten years	821,039
Total fair value	$ 5,466,688
Weighted- Average Yield
Due within one year	3.05%
Due after one year through five years	3.74%
Due after five years through ten years	3.61%
Due after ten years	3.55%
Weighted-average yield	3.58%