Farmer Mac Guaranteed Securities and USDA Securities - Schedule of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
AgVantage
Weighted- Average Yield
Held-to-maturity, accrued interest excluded	$ 36,900	$ 44,400
Farmer Mac Guaranteed Securities and USDA Securities
Amortized Cost
Due within one year	363,620
Due after one year through five years	646,909
Due after five years through ten years	280,707
Due after ten years	2,061,715
Total	3,352,951
Fair Value
Due within one year	359,461
Due after one year through five years	602,242
Due after five years through ten years	256,997
Due after ten years	1,873,634
Total	$ 3,092,334
Weighted- Average Yield
Due within one year	2.92%
Due after one year through five years	2.20%
Due after five years through ten years	3.25%
Due after ten years	3.36%
Total	3.05%