Other Borrowings - Summary of Short-term Credit Lines Available for Use (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Federal Home Loan Bank Line
Debt Instrument [Line Items]
Short-term credit lines available for use	$ 3,061,663	$ 3,071,518
Federal Reserve Bank of Chicago Discount Window Line
Debt Instrument [Line Items]
Short-term credit lines available for use	805,684	787,184
Available Federal Funds Line
Debt Instrument [Line Items]
Short-term credit lines available for use	$ 135,000	$ 135,000

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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