Farmer Mac Guaranteed Securities and USDA Securities - Schedule of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
AgVantage
Weighted- Average Yield
Held-to-maturity, accrued interest excluded	$ 44,400	$ 42,100
Farmer Mac Guaranteed Securities and USDA Securities
Amortized Cost
Due within one year	375,930
Due after one year through five years	660,556
Due after five years through ten years	276,635
Due after ten years	2,117,926
Total	3,431,047
Fair Value
Due within one year	369,834
Due after one year through five years	605,494
Due after five years through ten years	243,939
Due after ten years	1,844,966
Total	$ 3,064,233
Weighted- Average Yield
Due within one year	2.86%
Due after one year through five years	2.15%
Due after five years through ten years	3.15%
Due after ten years	3.29%
Total	2.99%