Loans, Allowance for Credit Losses and Credit Quality Financing Receivable, Allowance for Credit Loss (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022		Mar. 31, 2021		Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss		$ 144,518	[1]			$ 146,922	$ 113,392
Allowance for Loan and Lease Losses, Write-offs		(706)
Allowance for Loan and Lease Loss, Recovery of Bad Debts		302
Provision for Loan and Lease Losses		(2,000)
Loans and Leases Receivable, Allowance		144,518		$ 107,549	[1]	146,922
(Release of) provision for credit losses		(2,000)		(2,500)
Allowance for Loan and Lease Loss, Recovery of Bad Debts				343
Allowance for Loan and Lease Losses, Write-offs				(3,686)
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss		14,169	[1]			14,402	21,086
Allowance for Loan and Lease Losses, Write-offs		0
Allowance for Loan and Lease Loss, Recovery of Bad Debts		13
Provision for Loan and Lease Losses		(246)
Loans and Leases Receivable, Allowance	[1]			20,207
(Release of) provision for credit losses				2,388
Allowance for Loan and Lease Loss, Recovery of Bad Debts				64
Allowance for Loan and Lease Losses, Write-offs				(3,331)
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss		84,436	[1]			83,486	45,009
Allowance for Loan and Lease Losses, Write-offs		0
Allowance for Loan and Lease Loss, Recovery of Bad Debts		3
Provision for Loan and Lease Losses		947
Loans and Leases Receivable, Allowance	[1]			44,348
(Release of) provision for credit losses				(718)
Allowance for Loan and Lease Loss, Recovery of Bad Debts				57
Allowance for Loan and Lease Losses, Write-offs				0
Construction Loans [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss		11,867	[1]			12,316	5,397
Allowance for Loan and Lease Losses, Write-offs		0
Allowance for Loan and Lease Loss, Recovery of Bad Debts		0
Provision for Loan and Lease Losses		(449)
Loans and Leases Receivable, Allowance	[1]			5,268
(Release of) provision for credit losses				(129)
Allowance for Loan and Lease Loss, Recovery of Bad Debts				0
Allowance for Loan and Lease Losses, Write-offs				0
Small Business [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss		3,159	[1]			3,508	5,095
Allowance for Loan and Lease Losses, Write-offs		(48)
Allowance for Loan and Lease Loss, Recovery of Bad Debts		26
Provision for Loan and Lease Losses		(327)
Loans and Leases Receivable, Allowance	[1]			3,621
(Release of) provision for credit losses				(1,419)
Allowance for Loan and Lease Loss, Recovery of Bad Debts				11
Allowance for Loan and Lease Losses, Write-offs				(66)
Residential Real Estate [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss		18,388	[1]			14,484	14,275
Allowance for Loan and Lease Losses, Write-offs		0
Allowance for Loan and Lease Loss, Recovery of Bad Debts		0
Provision for Loan and Lease Losses		3,904
Loans and Leases Receivable, Allowance	[1]			12,956
(Release of) provision for credit losses				(1,320)
Allowance for Loan and Lease Loss, Recovery of Bad Debts				1
Allowance for Loan and Lease Losses, Write-offs				0
Home Equity Line of Credit [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss		11,750	[1]			17,986	22,060
Allowance for Loan and Lease Losses, Write-offs		(24)
Allowance for Loan and Lease Loss, Recovery of Bad Debts		26
Provision for Loan and Lease Losses		(6,238)
Loans and Leases Receivable, Allowance	[1]			20,716
(Release of) provision for credit losses				(1,357)
Allowance for Loan and Lease Loss, Recovery of Bad Debts				13
Allowance for Loan and Lease Losses, Write-offs				0
Consumer - Other [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss		749	[1]			$ 740	$ 470
Allowance for Loan and Lease Losses, Write-offs		(634)
Allowance for Loan and Lease Loss, Recovery of Bad Debts		234
Provision for Loan and Lease Losses		$ 409
Loans and Leases Receivable, Allowance	[1]			433
(Release of) provision for credit losses				55
Allowance for Loan and Lease Loss, Recovery of Bad Debts				197
Allowance for Loan and Lease Losses, Write-offs				$ (289)

[1] Balances of accrued interest receivable excluded from amortized cost and the calculation of allowance for credit losses amounted to $39.4 million and $33.4 million as of March 31, 2022 and March 31, 2021, respectively.