Federal Home Loan Bank Advances and Other Borrowings (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Federal Home Loan Bank, Advances [Line Items]
Loans pledged to secure FHLB advances	$ 1,170.0	$ 1,120.0
Additional borrowing capacity	768.8	840.6
Federal Reserve Discount Window
Federal Home Loan Bank, Advances [Line Items]
Carrying value of pledged loans	1,210.0	1,050.0
Outstanding borrowings	971.4	841.6
Overnight Federal Funds Lines
Federal Home Loan Bank, Advances [Line Items]
Overnight federal funds lines, maximum borrowing capacity	55.0	65.0
FHLB of San Francisco
Federal Home Loan Bank, Advances [Line Items]
Investment in FHLB capital stock	$ 15.0	$ 14.8

Amount of assets pledged to secure a debt instrument.

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Amount of advances or credit lines available from the Federal Home Loan Bank (FHLB).

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Amount of the collateral pledged in support of federal home loan bank advances outstanding.

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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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Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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