Loans, Allowance for Credit Losses and Credit Quality Finance Receivable, Nonaccrual (Details) - USD ($)		Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance	[1]	$ 31,213,000	$ 27,199,000
Financing Receivable, Nonaccrual, No Allowance	[1]	24,702,000	621,000
Tdrs Recorded Investment On Nonaccrual Status		1,677,000	1,993,000
Financing Receivable Recorded Investment Trouble Debt Restructuring		13,411,000	16,628,000
Additional Commitments To Lend To Borrower For Trouble Debt Restructuring		144,000	190,000
Financing Receivable, Nonaccrual	[1]	55,915,000	27,820,000
Tdrs Recorded Investment On Accrual Status		11,734,000	14,635,000
Commercial And Industrial [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		3,465,000	3,420,000
Financing Receivable, Nonaccrual, No Allowance		53,000	19,000
Financing Receivable, Nonaccrual		3,518,000	3,439,000
Commercial Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		16,008,000	10,870,000
Financing Receivable, Nonaccrual, No Allowance		24,066,000	0
Financing Receivable, Nonaccrual		40,074,000	10,870,000
Small Business [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		31,000	44,000
Financing Receivable, Nonaccrual, No Allowance		0	0
Financing Receivable, Nonaccrual		31,000	44,000
Residential Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		7,980,000	8,580,000
Financing Receivable, Nonaccrual, No Allowance		583,000	602,000
Financing Receivable, Nonaccrual		8,563,000	9,182,000
Home Equity Line of Credit [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		3,514,000	3,781,000
Financing Receivable, Nonaccrual, No Allowance		0	0
Financing Receivable, Nonaccrual		3,514,000	3,781,000
Consumer - Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		215,000	504,000
Financing Receivable, Nonaccrual, No Allowance		0	0
Financing Receivable, Nonaccrual		$ 215,000	$ 504,000

[1] Included in these amounts were $1.7 million and $2.0 million of nonaccruing TDRs at June 30, 2022 and December 31, 2021, respectively.