Loans and Allowance for Credit Losses - Schedule of Non-Accrual Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans With ACL	$ 98,005	$ 133,303
Non-Accrual Loans Without ACL	11,376	39,036
Total Non-Accrual Loans	109,381	172,339
Commercial Portfolio Segment \| Commercial and industrial
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans With ACL	271	8,810
Non-Accrual Loans Without ACL	3,098	3,284
Total Non-Accrual Loans	3,369	12,094
Commercial Portfolio Segment \| Commercial real estate
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans With ACL	58,731	70,010
Non-Accrual Loans Without ACL	7,836	35,402
Total Non-Accrual Loans	66,567	105,412
Commercial Portfolio Segment \| Commercial construction
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans With ACL	0	17,400
Non-Accrual Loans Without ACL	0	0
Total Non-Accrual Loans	0	17,400
Commercial Portfolio Segment \| Business banking
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans With ACL	10,451	11,319
Non-Accrual Loans Without ACL	442	350
Total Non-Accrual Loans	10,893	11,669
Residential Real Estate \| Residential real estate
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans With ACL	21,943	19,219
Non-Accrual Loans Without ACL	0	0
Total Non-Accrual Loans	21,943	19,219
Consumer Portfolio Segment \| Consumer home equity
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans With ACL	6,441	6,093
Non-Accrual Loans Without ACL	0	0
Total Non-Accrual Loans	6,441	6,093
Consumer Portfolio Segment \| Other Consumer
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans With ACL	168	452
Non-Accrual Loans Without ACL	0	0
Total Non-Accrual Loans	$ 168	$ 452