Loans - Schedule of Financing Receivables Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Total
Total	$ 9,130,933		$ 9,130,933		$ 9,008,979
Farm & Ranch
Year One
Total	396,304		396,304		1,252,022
Current period charge-offs	0	$ 0	0	$ 0
Year Two
Total	1,213,248		1,213,248		1,781,621
Current period charge-offs	0	0	0	0
Year Three
Total	1,702,094		1,702,094		1,236,079
Current period charge-offs	0	0	0	0
Year Four
Total	1,163,359		1,163,359		395,895
Current period charge-offs	0	0	0	0
Year Five
Total	360,067		360,067		265,661
Current period charge-offs	0	0	0	0
Prior
Total	1,172,364		1,172,364		1,032,986
Current period charge-offs	0	0	0	(84)
Revolving Loans - Amortized Cost Basis
Total	403,236		403,236		398,062
Current period charge-offs	0	0	0	0
Total
Total	6,410,672		6,410,672		6,362,326
Current period charge-offs	0	0	0	(84)
Corporate AgFinance
Year One
Total	180,030		180,030		145,263
Current period charge-offs	0	0	0	0
Year Two
Total	113,149		113,149		299,729
Current period charge-offs	0	0	0	0
Year Three
Total	278,204		278,204		226,158
Current period charge-offs	0	0	0	0
Year Four
Total	174,541		174,541		128,928
Current period charge-offs	0	0	0	0
Year Five
Total	120,043		120,043		76,454
Current period charge-offs	0	0	0	0
Prior
Total	114,779		114,779		44,827
Current period charge-offs	0	0	0	0
Revolving Loans - Amortized Cost Basis
Total	243,031		243,031		244,894
Current period charge-offs	0	0	0	0
Total
Total	1,223,777		1,223,777		1,166,253
Current period charge-offs	0	0	0	0
Rural Infrastructure Finance
Year One
Total	450,241		450,241		741,021
Current period charge-offs	0	0	0	0
Year Two
Total	724,129		724,129		220,420
Current period charge-offs	0	0	0	0
Year Three
Total	189,385		189,385		629,223
Current period charge-offs	0	0	0	0
Year Four
Total	598,689		598,689		739,270
Current period charge-offs	0	0	0	0
Year Five
Total	711,794		711,794		7,932
Current period charge-offs	0	0	0	0
Prior
Total	610,062		610,062		649,830
Current period charge-offs	0	0	0	0
Revolving Loans - Amortized Cost Basis
Total	58,413		58,413		33,570
Current period charge-offs	0	0	0	0
Total
Total	3,342,713		3,342,713		3,021,266
Current period charge-offs	0	$ 0	0	$ 0
Acceptable | Farm & Ranch
Year One
Total	346,745		346,745		1,157,829
Year Two
Total	1,143,457		1,143,457		1,704,547
Year Three
Total	1,633,550		1,633,550		1,187,474
Year Four
Total	1,129,203		1,129,203		360,704
Year Five
Total	317,213		317,213		242,491
Prior
Total	1,077,958		1,077,958		947,535
Revolving Loans - Amortized Cost Basis
Total	379,009		379,009		385,503
Total
Total	6,027,135		6,027,135		5,986,083
Acceptable | Corporate AgFinance
Year One
Total	180,030		180,030		145,263
Year Two
Total	98,524		98,524		299,729
Year Three
Total	262,572		262,572		221,560
Year Four
Total	123,685		123,685		108,230
Year Five
Total	99,696		99,696		76,454
Prior
Total	113,758		113,758		44,827
Revolving Loans - Amortized Cost Basis
Total	240,977		240,977		232,107
Total
Total	1,119,242		1,119,242		1,128,170
Acceptable | Rural Infrastructure Finance
Year One
Total	450,241		450,241		741,021
Year Two
Total	694,635		694,635		220,420
Year Three
Total	189,385		189,385		629,223
Year Four
Total	598,689		598,689		739,270
Year Five
Total	711,794		711,794		7,932
Prior
Total	610,062		610,062		649,830
Revolving Loans - Amortized Cost Basis
Total	58,413		58,413		33,570
Total
Total	3,313,219		3,313,219		3,021,266
Special mention | Farm & Ranch
Year One
Total	49,039		49,039		91,099
Year Two
Total	48,891		48,891		68,260
Year Three
Total	61,030		61,030		25,629
Year Four
Total	12,530		12,530		11,254
Year Five
Total	19,164		19,164		5,325
Prior
Total	29,464		29,464		17,797
Revolving Loans - Amortized Cost Basis
Total	13,430		13,430		2,452
Total
Total	233,548		233,548		221,816
Special mention | Corporate AgFinance
Year One
Total	0		0		0
Year Two
Total	14,625		14,625		0
Year Three
Total	15,632		15,632		0
Year Four
Total	50,856		50,856		20,698
Year Five
Total	20,347		20,347		0
Prior
Total	1,021		1,021		0
Revolving Loans - Amortized Cost Basis
Total	2,054		2,054		2,145
Total
Total	104,535		104,535		22,843
Special mention | Rural Infrastructure Finance
Year One
Total	0		0		0
Year Two
Total	0		0		0
Year Three
Total	0		0		0
Year Four
Total	0		0		0
Year Five
Total	0		0		0
Prior
Total	0		0		0
Revolving Loans - Amortized Cost Basis
Total	0		0		0
Total
Total	0		0		0
Substandard | Farm & Ranch
Year One
Total	520		520		3,094
Year Two
Total	20,900		20,900		8,814
Year Three
Total	7,514		7,514		22,976
Year Four
Total	21,626		21,626		23,937
Year Five
Total	23,690		23,690		17,845
Prior
Total	64,942		64,942		67,654
Revolving Loans - Amortized Cost Basis
Total	10,797		10,797		10,107
Total
Total	149,989		149,989		154,427
Substandard | Corporate AgFinance
Year One
Total	0		0		0
Year Two
Total	0		0		0
Year Three
Total	0		0		4,598
Year Four
Total	0		0		0
Year Five
Total	0		0		0
Prior
Total	0		0		0
Revolving Loans - Amortized Cost Basis
Total	0		0		10,642
Total
Total	0		0		15,240
Substandard | Rural Infrastructure Finance
Year One
Total	0		0		0
Year Two
Total	29,494		29,494		0
Year Three
Total	0		0		0
Year Four
Total	0		0		0
Year Five
Total	0		0		0
Prior
Total	0		0		0
Revolving Loans - Amortized Cost Basis
Total	0		0		0
Total
Total	$ 29,494		$ 29,494		$ 0