Guarantees and Commitments - Changes in Reserve for Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance			$ 1,433
Provision for/(release of )losses	$ 69	$ (163)	272	$ (273)
Ending balance	1,705		1,705
Agricultural Finance
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	1,396	993	819	1,068
Provision for/(release of )losses	75	(111)	652	(186)
Ending balance	1,471	882	1,471	882
Rural Infrastructure Finance
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	240	847	614	882
Provision for/(release of )losses	(6)	(52)	(380)	(87)
Ending balance	$ 234	$ 795	$ 234	$ 795