Loans, Allowance for Credit Losses and Credit Quality Finance Receivable, Nonaccrual (Details) - USD ($) $ in Thousands		Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance	[1]	$ 55,998	$ 27,199
Financing Receivable, Nonaccrual, No Allowance	[1]	19	621
Financing Receivable, Nonaccrual	[1]	56,017	27,820
Commercial And Industrial [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		27,374	3,420
Financing Receivable, Nonaccrual, No Allowance		19	19
Financing Receivable, Nonaccrual		27,393	3,439
Commercial Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		15,982	10,870
Financing Receivable, Nonaccrual, No Allowance		0	0
Financing Receivable, Nonaccrual		15,982	10,870
Small Business [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		50	44
Financing Receivable, Nonaccrual, No Allowance		0	0
Financing Receivable, Nonaccrual		50	44
Residential Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		8,891	8,580
Financing Receivable, Nonaccrual, No Allowance		0	602
Financing Receivable, Nonaccrual		8,891	9,182
Home Equity Loan [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		3,485	3,781
Financing Receivable, Nonaccrual, No Allowance		0	0
Financing Receivable, Nonaccrual		3,485	3,781
Consumer - Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		216	504
Financing Receivable, Nonaccrual, No Allowance		0	0
Financing Receivable, Nonaccrual		$ 216	$ 504

[1] Included in these amounts were $1.5 million and $2.0 million of nonaccruing TDRs at September 30, 2022 and December 31, 2021, respectively.