Revision of Prior Period Financial Statements - Schedule of Revised Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Interest income:
Farmer Mac Guaranteed Securities and USDA Securities	$ 283,769	$ 164,723	$ 232,951
Total interest income	716,848	425,965	508,794
Net interest income	270,940	221,951	195,848
Non-interest income/(expense):
Gains on financial derivatives	22,631	324	1,744
Non-interest income	38,688	23,066	18,043
Income before income taxes	225,679	172,461	144,683
Income tax expense	47,535	36,372	30,307
Net income	178,144	136,089	114,376
Net income attributable to common stockholders	$ 150,979	111,412	94,904
As previously Reported
Interest income:
Farmer Mac Guaranteed Securities and USDA Securities		163,547	227,691
Total interest income		424,789	503,534
Net interest income		220,775	190,588
Non-interest income/(expense):
Gains on financial derivatives		(3,348)	(246)
Non-interest income		19,394	16,053
Income before income taxes		167,613	137,433
Income tax expense		35,353	28,785
Net income		132,260	108,648
Net income attributable to common stockholders		107,583	89,176
Adjustments
Interest income:
Farmer Mac Guaranteed Securities and USDA Securities		1,176	5,260
Total interest income		1,176	5,260
Net interest income		1,176	5,260
Non-interest income/(expense):
Gains on financial derivatives		3,672	1,990
Non-interest income		3,672	1,990
Income before income taxes		4,848	7,250
Income tax expense		1,019	1,522
Net income		3,829	5,728
Net income attributable to common stockholders		$ 3,829	$ 5,728