Related Party and Other Transactions - Transactions with Director Institutions (Details) - Directors' Financial Institutions - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Related Party Transaction [Line Items]
Net capital stock issuances (redemptions and repurchases)	$ 0	$ 499	$ 0	$ 499
Net advances (repayments)	92,422	121,000	(148,129)	135,188
Mortgage loan purchases	$ 125,223	$ 19,999	$ 184,377	$ 38,210

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details