Portfolio Loans Receivable and Allowance for Credit Losses - Schedule of Outstanding Loan Commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount	$ 3,118,682	$ 2,965,071
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount	774,297	698,289
Real estate: \| Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount	784,220	765,808
Real estate: \| Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount	1,024,754	997,081
Real estate: \| Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount	380,688	359,566
Credit card \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount	149,184	142,397
Credit card \| Consumer \| Savings Deposits
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount	97,700	95,900
Other consumer \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount	5,539	1,930
Commitments to Extend Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused lines of credit on portfolio loans held for investment	457,722	455,666
Unused lines of credit on loans reclassified to held for sale (pending branch sale)	2,827	0
Letters of credit	1,797	1,633
Commitments to Extend Credit \| Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused lines of credit on portfolio loans held for investment	112,417	91,203
Commitments to Extend Credit \| Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused lines of credit on portfolio loans held for investment	103,177	90,990
Unused lines of credit on loans reclassified to held for sale (pending branch sale)	94	0
Commitments to Extend Credit \| Real estate: \| Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused lines of credit on portfolio loans held for investment	14,018	22,858
Unused lines of credit on loans reclassified to held for sale (pending branch sale)	593	0
Commitments to Extend Credit \| Real estate: \| Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused lines of credit on portfolio loans held for investment	37,102	69,887
Unused lines of credit on loans reclassified to held for sale (pending branch sale)	1,351	0
Commitments to Extend Credit \| Residential - Home Equity \| Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused lines of credit on portfolio loans held for investment	39,793	41,864
Unused lines of credit on loans reclassified to held for sale (pending branch sale)	789
Commitments to Extend Credit \| Credit card \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused lines of credit on portfolio loans held for investment	150,980	138,632
Commitments to Extend Credit \| Other consumer \| Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unused lines of credit on portfolio loans held for investment	$ 235	$ 232

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