Loans - Schedule of Financing Receivables Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Total
Total	$ 8,915,656		$ 9,008,979
Agricultural Finance
Total
Current period charge-offs	0	$ (84)
Farm & Ranch
Year One
Total	114,254		1,252,022
Current period charge-offs	0	0
Year Two
Total	1,243,916		1,781,621
Current period charge-offs	0	0
Year Three
Total	1,738,509		1,236,079
Current period charge-offs	0	0
Year Four
Total	1,200,554		395,895
Current period charge-offs	0	0
Year Five
Total	387,733		265,661
Current period charge-offs	0	0
Prior
Total	1,244,914		1,032,986
Current period charge-offs	0	(84)
Revolving Loans - Amortized Cost Basis
Total	376,199		398,062
Current period charge-offs	0	0
Total
Total	6,306,079		6,362,326
Current period charge-offs	0	(84)
Corporate AgFinance
Year One
Total	102,924		145,263
Current period charge-offs	0	0
Year Two
Total	144,361		299,729
Current period charge-offs	0	0
Year Three
Total	280,569		226,158
Current period charge-offs	0	0
Year Four
Total	177,690		128,928
Current period charge-offs	0	0
Year Five
Total	127,759		76,454
Current period charge-offs	0	0
Prior
Total	119,813		44,827
Current period charge-offs	0	0
Revolving Loans - Amortized Cost Basis
Total	219,748		244,894
Current period charge-offs	0	0
Total
Total	1,172,864		1,166,253
Current period charge-offs	0	0
Rural Infrastructure Finance
Year One
Total	247,553		741,021
Current period charge-offs	0	0
Year Two
Total	727,714		220,420
Current period charge-offs	0	0
Year Three
Total	177,165		629,223
Current period charge-offs	0	0
Year Four
Total	619,983		739,270
Current period charge-offs	0	0
Year Five
Total	730,252		7,932
Current period charge-offs	0	0
Prior
Total	635,181		649,830
Current period charge-offs	0	0
Revolving Loans - Amortized Cost Basis
Total	40,256		33,570
Current period charge-offs	0	0
Total
Total	3,178,104		3,021,266
Current period charge-offs	0	$ 0
Acceptable | Farm & Ranch
Year One
Total	110,328		1,157,829
Year Two
Total	1,160,657		1,704,547
Year Three
Total	1,660,716		1,187,474
Year Four
Total	1,155,561		360,704
Year Five
Total	330,442		242,491
Prior
Total	1,141,358		947,535
Revolving Loans - Amortized Cost Basis
Total	352,316		385,503
Total
Total	5,911,378		5,986,083
Acceptable | Corporate AgFinance
Year One
Total	91,825		145,263
Year Two
Total	144,361		299,729
Year Three
Total	280,569		221,560
Year Four
Total	124,825		108,230
Year Five
Total	107,234		76,454
Prior
Total	119,813		44,827
Revolving Loans - Amortized Cost Basis
Total	216,575		232,107
Total
Total	1,085,202		1,128,170
Acceptable | Rural Infrastructure Finance
Year One
Total	247,553		741,021
Year Two
Total	727,714		220,420
Year Three
Total	177,165		629,223
Year Four
Total	619,983		739,270
Year Five
Total	730,252		7,932
Prior
Total	635,181		649,830
Revolving Loans - Amortized Cost Basis
Total	40,256		33,570
Total
Total	3,178,104		3,021,266
Special mention | Farm & Ranch
Year One
Total	3,926		91,099
Year Two
Total	76,144		68,260
Year Three
Total	69,920		25,629
Year Four
Total	24,128		11,254
Year Five
Total	24,410		5,325
Prior
Total	22,625		17,797
Revolving Loans - Amortized Cost Basis
Total	13,547		2,452
Total
Total	234,700		221,816
Special mention | Corporate AgFinance
Year One
Total	0		0
Year Two
Total	0		0
Year Three
Total	0		0
Year Four
Total	51,737		20,698
Year Five
Total	20,525		0
Prior
Total	0		0
Revolving Loans - Amortized Cost Basis
Total	2,145		2,145
Total
Total	74,407		22,843
Special mention | Rural Infrastructure Finance
Year One
Total	0		0
Year Two
Total	0		0
Year Three
Total	0		0
Year Four
Total	0		0
Year Five
Total	0		0
Prior
Total	0		0
Revolving Loans - Amortized Cost Basis
Total	0		0
Total
Total	0		0
Substandard | Farm & Ranch
Year One
Total	0		3,094
Year Two
Total	7,115		8,814
Year Three
Total	7,873		22,976
Year Four
Total	20,865		23,937
Year Five
Total	32,881		17,845
Prior
Total	80,931		67,654
Revolving Loans - Amortized Cost Basis
Total	10,336		10,107
Total
Total	160,001		154,427
Substandard | Corporate AgFinance
Year One
Total	11,099		0
Year Two
Total	0		0
Year Three
Total	0		4,598
Year Four
Total	1,128		0
Year Five
Total	0		0
Prior
Total	0		0
Revolving Loans - Amortized Cost Basis
Total	1,028		10,642
Total
Total	13,255		15,240
Substandard | Rural Infrastructure Finance
Year One
Total	0		0
Year Two
Total	0		0
Year Three
Total	0		0
Year Four
Total	0		0
Year Five
Total	0		0
Prior
Total	0		0
Revolving Loans - Amortized Cost Basis
Total	0		0
Total
Total	$ 0		$ 0