Loans, Allowance for Credit Losses and Credit Quality Finance Receivable, Nonaccrual (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance	[1]	$ 31,368	$ 27,199
Financing Receivable, Nonaccrual, No Allowance	[1]	25,250	621
Tdrs Recorded Investment On Nonaccrual Status		1,972	1,993
Financing Receivable Recorded Investment Trouble Debt Restructuring		15,260	16,628
Additional Commitments To Lend To Borrower For Trouble Debt Restructuring		174	190
Financing Receivable, Nonaccrual	[1]	56,618	27,820
Tdrs Recorded Investment On Accrual Status		13,288	14,635
Commercial And Industrial [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		3,498	3,420
Financing Receivable, Nonaccrual, No Allowance		19	19
Financing Receivable, Nonaccrual		3,517	3,439
Commercial Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		15,835	10,870
Financing Receivable, Nonaccrual, No Allowance		24,635	0
Financing Receivable, Nonaccrual		40,470	10,870
Small Business [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		20	44
Financing Receivable, Nonaccrual, No Allowance		0
Financing Receivable, Nonaccrual		20	44
Residential Real Estate [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		7,861	8,580
Financing Receivable, Nonaccrual, No Allowance		596	602
Financing Receivable, Nonaccrual		8,457	9,182
Home Equity Line of Credit [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		3,761	3,781
Financing Receivable, Nonaccrual, No Allowance		0	0
Financing Receivable, Nonaccrual		3,761	3,781
Consumer - Other [Member]
Financing Receivable, Nonaccrual [Line Items]
Finance Receivable, Nonaccrual, with allowance		393	504
Financing Receivable, Nonaccrual, No Allowance		0	0
Financing Receivable, Nonaccrual		$ 393	$ 504

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