Loans and Allowance for Credit Losses - Loans on Nonaccrual Status and Loans Past Due 90 Days or More and Still Accruing (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	$ 55,558	$ 27,937
End of Period Nonaccrual	40,216	55,558
Nonaccrual With No Related Allowance	12,543	27,521
Interest income recognized on nonaccrual	650	1,699
Commercial loans | Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	15,185	3,228
End of Period Nonaccrual	6,937	15,185
Nonaccrual With No Related Allowance	6,937	14,936
Interest income recognized on nonaccrual	169	123
Commercial loans | Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	24,906	11,173
End of Period Nonaccrual	16,243	24,906
Nonaccrual With No Related Allowance	3,325	12,585
Interest income recognized on nonaccrual	192	202
Commercial loans | Commercial construction
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	869	0
End of Period Nonaccrual	0	869
Nonaccrual With No Related Allowance	0	0
Interest income recognized on nonaccrual	4	581
Commercial loans | Business banking
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	3,576	2,988
End of Period Nonaccrual	5,018	3,576
Nonaccrual With No Related Allowance	2,281	0
Interest income recognized on nonaccrual	63	198
Consumer loans | Consumer real estate
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	10,864	10,318
End of Period Nonaccrual	11,878	10,864
Nonaccrual With No Related Allowance	0	0
Interest income recognized on nonaccrual	221	592
Consumer loans | Other consumer
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	158	230
End of Period Nonaccrual	140	158
Nonaccrual With No Related Allowance	0	0
Interest income recognized on nonaccrual	$ 1	$ 3