Guarantees and Commitments - Changes in Reserve for Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	$ 1,433
Provision for/(release of )losses	203	$ (110)
Ending balance	1,636
Agricultural Finance
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	819	1,068
Provision for/(release of )losses	577	(75)
Ending balance	1,396	993
Rural Infrastructure Finance
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning balance	614	882
Provision for/(release of )losses	(374)	(35)
Ending balance	$ 240	$ 847