Farmer Mac Guaranteed Securities and USDA Securities - Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Unrealized loss position for less than 12 months
Unrealized loss position for less than 12 months, Fair Value	$ 2,453,999	$ 1,989,439
Unrealized loss position for less than 12 months, Unrealized Loss	(67,367)	(9,419)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, Fair Value	167,784	107,592
Unrealized loss position for more than 12 months, Unrealized Loss	(2,821)	(1,055)
Operating Segments
Unrealized loss position for less than 12 months
Unrealized loss position for less than 12 months, Fair Value	2,887,202
Unrealized loss position for less than 12 months, Unrealized Loss	(96,142)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, Fair Value	197,060
Unrealized loss position for more than 12 months, Unrealized Loss	(21,605)
USDA Securities:
Unrealized loss position for less than 12 months
Fair Value	2,379,076	0
Unrealized Loss	(44,593)	0
Unrealized loss position for more than 12 months
Fair Value	0	0
Unrealized Loss	0	0
Farmer Mac Guaranteed Securities and USDA Securities
Unrealized loss position for less than 12 months
Fair Value	3,677,161	1,387,236
Unrealized Loss	(60,817)	(12,764)
Unrealized loss position for more than 12 months
Fair Value	207,683	0
Unrealized Loss	(17,317)	0
AgVantage | Farmer Mac Guaranteed Securities
Unrealized loss position for less than 12 months
Fair Value	1,287,544	1,387,236
Unrealized Loss	(15,861)	(12,764)
Unrealized loss position for more than 12 months
Fair Value	207,683	0
Unrealized Loss	(17,317)	0
Unrealized loss position for less than 12 months
Unrealized loss position for less than 12 months, Fair Value		1,867,364
Unrealized loss position for less than 12 months, Unrealized Loss		(17,263)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, Fair Value		90,971
Unrealized loss position for more than 12 months, Unrealized Loss		$ (2,747)
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	2,876,180
Unrealized loss position for less than 12 months, Unrealized Loss	(95,246)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, Fair Value	197,060
Unrealized loss position for more than 12 months, Unrealized Loss	(21,605)
USDA Securities | Farmer Mac Guaranteed Securities
Unrealized loss position for less than 12 months
Fair Value	10,541
Unrealized Loss	(363)
Unrealized loss position for more than 12 months
Fair Value	0
Unrealized Loss	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	11,022
Unrealized loss position for less than 12 months, Unrealized Loss	(896)
Unrealized loss position for more than 12 months
Unrealized loss position for more than 12 months, Fair Value	0
Unrealized loss position for more than 12 months, Unrealized Loss	$ 0