Farmer Mac Guaranteed Securities and USDA Securities - Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Unrealized loss position for less than 12 months
Unrealized loss position for less than 12 months, Fair Value	$ 1,774,155	$ 2,819,885
Unrealized loss position for less than 12 months, Unrealized Loss	(38,277)	(96,252)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, Fair Value	2,599,418	1,254,553
Unrealized loss position for more than 12 months, Unrealized Loss	(204,846)	(98,280)
Operating Segments
Unrealized loss position for less than 12 months
Unrealized loss position for less than 12 months, Fair Value	993,705	4,649,943
Unrealized loss position for less than 12 months, Unrealized Loss	(30,193)	(270,661)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, Fair Value	4,055,377	1,548,551
Unrealized loss position for more than 12 months, Unrealized Loss	(447,582)	(143,123)
USDA Securities
Unrealized loss position for less than 12 months
Fair Value	1,495	2,086,108
Unrealized Loss	(22)	(312,824)
Unrealized loss position for more than 12 months
Fair Value	1,921,243	0
Unrealized Loss	(390,300)	0
Farmer Mac Guaranteed Securities and USDA Securities
Unrealized loss position for less than 12 months
Fair Value	2,043,447	2,654,532
Unrealized Loss	(2,957)	(325,135)
Unrealized loss position for more than 12 months
Fair Value	2,742,069	382,358
Unrealized Loss	(437,948)	(42,643)
AgVantage | Farmer Mac Guaranteed Securities
Unrealized loss position for less than 12 months
Fair Value	2,022,393	548,634
Unrealized Loss	(2,613)	(11,455)
Unrealized loss position for more than 12 months
Fair Value	812,575	382,358
Unrealized Loss	(46,608)	(42,643)
Unrealized loss position for less than 12 months
Unrealized loss position for less than 12 months, Fair Value		4,642,096
Unrealized loss position for less than 12 months, Unrealized Loss		(267,886)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, Fair Value		1,548,551
Unrealized loss position for more than 12 months, Unrealized Loss		(143,123)
AgVantage | Farmer Mac Guaranteed Securities | Operating Segments
Unrealized loss position for less than 12 months
Unrealized loss position for less than 12 months, Fair Value	993,705
Unrealized loss position for less than 12 months, Unrealized Loss	(30,193)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, Fair Value	4,055,377
Unrealized loss position for more than 12 months, Unrealized Loss	(447,582)
USDA Securities | Farmer Mac Guaranteed Securities
Unrealized loss position for less than 12 months
Fair Value	19,559	19,790
Unrealized Loss	(322)	(856)
Unrealized loss position for more than 12 months
Fair Value	8,251	0
Unrealized Loss	(1,040)	0
USDA Securities | Farmer Mac Guaranteed Securities | Operating Segments
Unrealized loss position for less than 12 months
Unrealized loss position for less than 12 months, Fair Value	0	7,847
Unrealized loss position for less than 12 months, Unrealized Loss	0	(2,775)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, Fair Value	0	0
Unrealized loss position for more than 12 months, Unrealized Loss	$ 0	$ 0