Farmer Mac Guaranteed Securities and USDA Securities - Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Unrealized loss position for less than 12 months
Unrealized loss position for less than 12 months, Fair Value	$ 1,913,754	$ 2,819,885
Unrealized loss position for less than 12 months, Unrealized Loss	(35,961)	(96,252)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, Fair Value	1,720,600	1,254,553
Unrealized loss position for more than 12 months, Unrealized Loss	(114,789)	(98,280)
Operating Segments
Unrealized loss position for less than 12 months
Unrealized loss position for less than 12 months, Fair Value	4,087,761	4,649,943
Unrealized loss position for less than 12 months, Unrealized Loss	(132,418)	(270,661)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, Fair Value	2,574,107	1,548,551
Unrealized loss position for more than 12 months, Unrealized Loss	(214,237)	(143,123)
USDA Securities:
Unrealized loss position for less than 12 months
Fair Value	0	2,086,108
Unrealized Loss	0	(312,824)
Unrealized loss position for more than 12 months
Fair Value	2,130,022	0
Unrealized Loss	(216,826)	0
Farmer Mac Guaranteed Securities and USDA Securities
Unrealized loss position for less than 12 months
Fair Value	430,353	2,654,532
Unrealized Loss	(5,980)	(325,135)
Unrealized loss position for more than 12 months
Fair Value	2,624,674	382,358
Unrealized Loss	(255,514)	(42,643)
AgVantage | Farmer Mac Guaranteed Securities
Unrealized loss position for less than 12 months
Fair Value	421,384	548,634
Unrealized Loss	(5,449)	(11,455)
Unrealized loss position for more than 12 months
Fair Value	485,324	382,358
Unrealized Loss	(38,390)	(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	4,087,761
Unrealized loss position for less than 12 months, Unrealized Loss	(132,418)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, Fair Value	2,566,073
Unrealized loss position for more than 12 months, Unrealized Loss	(212,082)
USDA Securities | Farmer Mac Guaranteed Securities
Unrealized loss position for less than 12 months
Fair Value	8,969	19,790
Unrealized Loss	(531)	(856)
Unrealized loss position for more than 12 months
Fair Value	9,328	0
Unrealized Loss	(298)	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	8,034	0
Unrealized loss position for more than 12 months, Unrealized Loss	$ (2,155)	$ 0