FARMER MAC GUARANTEED SECURITIES AND USDA SECURITIES - Schedule of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
AgVantage
Weighted- Average Yield
Held-to-maturity, accrued interest excluded	$ 59,400	$ 67,400
Farmer Mac Guaranteed Securities and USDA Securities
Amortized Cost
Due within one year	2,141,438
Due after one year through five years	1,692,904
Due after five years through ten years	249,080
Due after ten years	2,704,716
Total, Amortized Cost	6,788,138
Fair Value
Due within one year	2,139,182
Due after one year through five years	1,657,244
Due after five years through ten years	217,955
Due after ten years	2,423,437
Total, Fair Value	$ 6,437,818
Weighted- Average Yield
Due within one year	5.72%
Due after one year through five years	4.63%
Due after five years through ten years	3.58%
Due after ten years	4.32%
Total, Weighted- Average Yield	4.85%