Farmer Mac Guaranteed Securities and USDA Securities - Schedule of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
AgVantage
Weighted- Average Yield
Held-to-maturity, accrued interest excluded	$ 34,000	$ 42,100
Farmer Mac Guaranteed Securities and USDA Securities
Amortized Cost
Due within one year	898,593
Due after one year through five years	826,067
Due after five years through ten years	247,037
Due after ten years	2,148,641
Total	4,120,338
Fair Value
Due within one year	894,781
Due after one year through five years	782,613
Due after five years through ten years	229,329
Due after ten years	1,990,325
Total	$ 3,897,048
Weighted- Average Yield
Due within one year	1.87%
Due after one year through five years	1.97%
Due after five years through ten years	2.87%
Due after ten years	3.19%
Total	2.62%