Loans - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans held for sale, at lower of cost or fair value	$ 9,000		$ 0
Provision for/(release of) losses	56	$ 913
Rural Infrastructure Finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for/(release of) losses	(977)	1,002
Agricultural Finance
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for/(release of) losses	$ 590	$ (27)