Related Party and Other Transactions - Balances with Director Institutions (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Related Party Transaction [Line Items]
Total advances, par value	$ 41,919,409	$ 39,580,297
Directors' Financial Institutions
Related Party Transaction [Line Items]
Capital stock, par value	$ 92,691	$ 46,366
Capital stock, % of total	3.00%	2.00%
Total advances, par value	$ 1,568,395	$ 625,024
Advances, % of total	4.00%	2.00%

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.

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+ Details