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Federal Home Loan Bank Advances (Notes)	12 Months Ended
	Dec. 31, 2025
Federal Home Loan Bank Advances [Abstract]
Federal Home Loan Bank Advances, Disclosure [Text Block]	Federal Home Loan Bank Advances and Other Borrowings The Company had fixed-rate FHLB advances totaling $270,000 as of both December 31, 2025 and 2024. As of December 31, 2025, all advances had maturities of one month and are part of a rolling funding program associated with long-term interest rate swaps related to the interest cash flows of the rolling advances. The weighted average contractual rates on FHLB advances were 3.95 percent and 4.62 percent as of December 31, 2025 and December 31, 2024, respectively. The weighted average effective rate for these advances, which includes adjustments for the interest rate swaps, when applicable, was 3.39 percent as of both December 31, 2025 and 2024. See Note 11 for additional information on interest rate swaps hedging FHLB advances. The FHLB advances are collateralized by FHLB stock and real estate loans, as required by the FHLB’s collateral policy. West Bank had additional borrowing capacity of approximately $649,000 at the FHLB as of December 31, 2025. As of December 31, 2025, West Bank had arrangements that would allow it to borrow $75,000 in unsecured federal funds lines of credit at correspondent banks that are available under the correspondent banks’ normal terms. The lines have no stated expiration dates. As of December 31, 2025, there were no amounts outstanding under these arrangements. At December 31, 2025, West Bank also had $38,341 of securities pledged for available borrowings at the Federal Reserve Bank discount window. There were no balances outstanding at the Federal Reserve Bank discount window at December 31, 2025.

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- Definition

The entire disclosure for borrowing from the Federal Home Loan Bank, including: (i) general description; (ii) title and nature of obligation; (iii) interest rate; (iv) payment terms; (v) maturity dates by year; (vi) collateral requirements; (vii) restrictive covenants; (viii) priority; (ix) conversion or redemption features; (x) carrying value of assets pledged as collateral; (xi) combined aggregate maturities for next five years; (xii) unused or available balances.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13)(3)(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 470
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478878/942-470-45-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477734/942-470-50-3

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-SubTopic 10
-Topic 470
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481544/470-10-50-1

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Federal Home Loan Bank Advances [Abstract]

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