Farmer Mac Guaranteed Securities and USDA Securities - Schedule of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
AgVantage
Weighted- Average Yield
Available-for-sale, accrued interest excluded	$ 44,000	$ 29,800
Farmer Mac Guaranteed Securities
Amortized Cost
Due within one year	1,264,459
Due after one year through five years	3,042,213
Due after five years through ten years	1,389,102
Due after ten years	1,725,821
Debt securities, available-for-sale, amortized cost	7,421,595
Fair Value
Due within one year	1,260,840
Due after one year through five years	2,890,360
Due after five years through ten years	1,279,044
Due after ten years	1,543,758
Total, Fair Value	$ 6,974,002
Weighted- Average Yield
Due within one year	3.14%
Due after one year through five years	3.03%
Due after five years through ten years	3.29%
Due after ten years	3.53%
Total, Weighted-Average Yield	3.21%