Loans and Other Finance Receivables - Schedule of Non-Accruing Collateral-Dependent Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	$ 58,659	$ 55,060
Total
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	57,099	53,081
Total \| Commercial mortgage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	6,748	2,472
Total \| Home equity lines and loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	2,223	2,023
Total \| Residential mortgage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	9,350	10,385
Total \| Construction
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	7,688	6,650
Total \| Commercial, industrial & other finance receivables
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	7,179	6,770
Total \| Small business loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	23,911	24,781
Real estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	46,732	42,189
Real estate \| Commercial mortgage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	6,748	2,472
Real estate \| Home equity lines and loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	2,223	2,023
Real estate \| Residential mortgage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	9,350	10,385
Real estate \| Construction
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	7,688	6,650
Real estate \| Commercial, industrial & other finance receivables
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	849	1,372
Real estate \| Small business loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	19,874	19,287
Equipment and other
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	10,367	10,892
Equipment and other \| Commercial mortgage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	0	0
Equipment and other \| Home equity lines and loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	0	0
Equipment and other \| Residential mortgage
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	0	0
Equipment and other \| Construction
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	0	0
Equipment and other \| Commercial, industrial & other finance receivables
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	6,330	5,398
Equipment and other \| Small business loans
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual loans	$ 4,037	$ 5,494