Loans, Allowance for Credit Losses and Credit Quality Financing Receivable Past Due (Details) $ in Thousands		Sep. 30, 2022 USD ($) loan		Dec. 31, 2021 USD ($) loan	Sep. 30, 2021 USD ($)
Financing Receivable, Past Due [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		559		518
Financing Receivable, 90 Days or More Past Due, Still Accruing		$ 0		$ 0
Loans and Leases Receivable, Gross		$ 13,700,350	[1]	$ 13,587,286	$ 8,808,013
Number Of Financing Receivables Total Past Due | loan		676		701
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		60		60
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		57		123
Total loans		$ 13,700,350		$ 13,587,286
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		10,164		37,927
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		8,571		1,677
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		4,202		7,092
Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total loans		13,677,413		13,540,590
Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total loans		$ 22,937		$ 46,696
Commercial And Industrial [Member]
Financing Receivable, Past Due [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		10		7
Financing Receivable, 90 Days or More Past Due, Still Accruing		$ 0		$ 0
Loans and Leases Receivable, Gross		$ 1,548,349	[1]	$ 1,563,279	1,640,709	[1]
Number Of Financing Receivables Total Past Due | loan		14		11
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		1		2
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		3		2
Total loans		$ 1,548,349		$ 1,563,279
Commercial And Industrial [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		322		143
Commercial And Industrial [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		182		252
Commercial And Industrial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		558		24
Commercial And Industrial [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total loans		1,547,287		1,562,860
Commercial And Industrial [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total loans		$ 1,062		$ 419
Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		9		15
Financing Receivable, 90 Days or More Past Due, Still Accruing		$ 0		$ 0
Loans and Leases Receivable, Gross		$ 7,677,917	[1]	$ 7,992,344	4,221,259	[1]
Number Of Financing Receivables Total Past Due | loan		16		19
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		5		0
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		2		4
Total loans		$ 7,677,917		$ 7,992,344
Commercial Real Estate [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		5,419		32,845
Commercial Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		4,491		0
Commercial Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		208		1,339
Commercial Real Estate [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total loans		7,667,799		7,958,160
Commercial Real Estate [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total loans		$ 10,118		$ 34,184
Construction Loans [Member]
Financing Receivable, Past Due [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		0		0
Financing Receivable, 90 Days or More Past Due, Still Accruing		$ 0		$ 0
Loans and Leases Receivable, Gross		$ 1,185,157	[1]	$ 1,165,457	515,415	[1]
Number Of Financing Receivables Total Past Due | loan		1		0
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		1		0
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		0		0
Total loans		$ 1,185,157		$ 1,165,457
Construction Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		0		0
Construction Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		1,661		0
Construction Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		0		0
Construction Loans [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total loans		1,183,496		1,165,457
Construction Loans [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total loans		$ 1,661		$ 0
Small Business [Member]
Financing Receivable, Past Due [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		7		11
Financing Receivable, 90 Days or More Past Due, Still Accruing		$ 0		$ 0
Loans and Leases Receivable, Gross		$ 209,567	[1]	$ 193,189	184,138	[1]
Number Of Financing Receivables Total Past Due | loan		16		21
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		3		6
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		6		4
Total loans		$ 209,567		$ 193,189
Small Business [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		233		136
Small Business [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		15		53
Small Business [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		29		24
Small Business [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total loans		209,290		192,976
Small Business [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total loans		$ 277		$ 213
Residential Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		15		12
Financing Receivable, 90 Days or More Past Due, Still Accruing		$ 0		$ 0
Loans and Leases Receivable, Gross		$ 1,959,254	[1]	$ 1,604,686	1,222,849	[1]
Number Of Financing Receivables Total Past Due | loan		40		93
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		6		5
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		19		76
Total loans		$ 1,959,254		$ 1,604,686
Residential Real Estate [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		3,146		2,709
Residential Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		1,202		714
Residential Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		1,804		3,922
Residential Real Estate [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total loans		1,953,102		1,597,341
Residential Real Estate [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total loans		$ 6,152		$ 7,345
Home Equity Loan [Member]
Financing Receivable, Past Due [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		14		15
Financing Receivable, 90 Days or More Past Due, Still Accruing		$ 0		$ 0
Loans and Leases Receivable, Gross		$ 1,087,170	[1]	$ 1,039,611	$ 1,000,468	[1]
Number Of Financing Receivables Total Past Due | loan		41		42
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		8		6
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		19		21
Home Equity Loan [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		$ 534		$ 1,375
Home Equity Loan [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		775		381
Home Equity Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans		1,577		1,671
Home Equity Loan [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total loans		1,084,284		1,036,184
Home Equity Loan [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total loans		$ 2,886		$ 3,427
Consumer - Other [Member]
Financing Receivable, Past Due [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan	[2]	504		458
Financing Receivable, 90 Days or More Past Due, Still Accruing	[2]	$ 0		$ 0
Loans and Leases Receivable, Gross	[2]	$ 32,936		$ 28,720
Number Of Financing Receivables Total Past Due | loan	[2]	548		515
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan	[2]	36		41
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan	[2]	8		16
Total loans		$ 32,936		$ 28,720
Consumer - Other [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans	[2]	510		719
Consumer - Other [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans	[2]	245		277
Consumer - Other [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Total loans	[2]	26		112
Consumer - Other [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Total loans	[2]	32,155		27,612
Consumer - Other [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Total loans	[2]	$ 781		$ 1,108

[1] Loan origination dates in the tables above reflect the original origination date, or the date of a material modification of a previously originated loan.

[2] Other consumer portfolio is inclusive of deposit account overdrafts recorded as loan balances.