Portfolio Loans Receivable and Allowance for Credit Losses - Narrative (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
Specific reserve on collateral dependent loans	4,500	4,200
Real estate: \| Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount	784,220	765,808
Specific reserve on collateral dependent loans	100	40
Real estate: \| Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount	1,024,754	997,081
Specific reserve on collateral dependent loans	500	1,300
Real estate: \| Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount	380,688	359,566
Specific reserve on collateral dependent loans	900
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount	$ 10,400	$ 6,100