Loans, Allowance for Credit Losses and Credit Quality Financing Receivable Past Due (Details) $ in Thousands		Jun. 30, 2022 USD ($) loan		Dec. 31, 2021 USD ($) loan	Jun. 30, 2021 USD ($)
Financing Receivable, Past Due [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		446		518
Financing Receivable, 90 Days or More Past Due, Still Accruing		$ 0		$ 0
Loans and Leases Receivable, Gross		$ 13,675,764	[1]	$ 13,587,286	$ 8,938,988
Number Of Financing Receivables Total Past Due | loan		540		701
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		33		60
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		61		123
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 5,251		$ 37,927
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		26,756		1,677
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		22,660		7,092
Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		13,621,097		13,540,590
Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 54,667		$ 46,696
Commercial And Industrial [Member]
Financing Receivable, Past Due [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		6		7
Financing Receivable, 90 Days or More Past Due, Still Accruing		$ 0		$ 0
Loans and Leases Receivable, Gross		$ 1,541,046	[1]	$ 1,563,279	1,726,498	[1]
Number Of Financing Receivables Total Past Due | loan		11		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		4		2
Financing Receivable, before Allowance for Credit Loss		$ 1,541,046		$ 1,563,279
Commercial And Industrial [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		442		143
Commercial And Industrial [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		188		252
Commercial And Industrial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		3,405		24
Commercial And Industrial [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		1,537,011		1,562,860
Commercial And Industrial [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 4,035		$ 419
Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		5		15
Financing Receivable, 90 Days or More Past Due, Still Accruing		$ 0		$ 0
Loans and Leases Receivable, Gross		$ 7,791,757	[1]	$ 7,992,344	4,251,543	[1]
Number Of Financing Receivables Total Past Due | loan		13		19
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		2		0
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		6		4
Financing Receivable, before Allowance for Credit Loss		$ 7,791,757		$ 7,992,344
Commercial Real Estate [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		881		32,845
Commercial Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		24,066		0
Commercial Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		15,067		1,339
Commercial Real Estate [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		7,751,743		7,958,160
Commercial Real Estate [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 40,014		$ 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		$ 1,194,577	[1]	$ 1,165,457	496,539	[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
Financing Receivable, before Allowance for Credit Loss		$ 1,194,577		$ 1,165,457
Construction Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		0		0
Construction Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		1,669		0
Construction Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		0		0
Construction Loans [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		1,192,908		1,165,457
Construction Loans [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 1,669		$ 0
Small Business [Member]
Financing Receivable, Past Due [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		3		11
Financing Receivable, 90 Days or More Past Due, Still Accruing		$ 0		$ 0
Loans and Leases Receivable, Gross		$ 205,953	[1]	$ 193,189	182,863	[1]
Number Of Financing Receivables Total Past Due | loan		9		21
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		1		6
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		5		4
Financing Receivable, before Allowance for Credit Loss		$ 205,953		$ 193,189
Small Business [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		100		136
Small Business [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		5		53
Small Business [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		30		24
Small Business [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		205,818		192,976
Small Business [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 135		$ 213
Residential Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		14		12
Financing Receivable, 90 Days or More Past Due, Still Accruing		$ 0		$ 0
Loans and Leases Receivable, Gross		$ 1,844,057	[1]	$ 1,604,686	$ 1,240,279	[1]
Number Of Financing Receivables Total Past Due | loan		38		93
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan		3		5
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan		21		76
Financing Receivable, before Allowance for Credit Loss		$ 1,844,057		$ 1,604,686
Residential Real Estate [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		2,542		2,709
Residential Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		470		714
Residential Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		2,576		3,922
Residential Real Estate [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		1,838,469		1,597,341
Residential Real Estate [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 5,588		$ 7,345
Home Equity Line of Credit [Member]
Financing Receivable, Past Due [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan		8		15
Financing Receivable, 90 Days or More Past Due, Still Accruing		$ 0		$ 0
Loans and Leases Receivable, Gross		$ 1,065,510		$ 1,039,611
Number Of Financing Receivables Total Past Due | loan		31		42
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		20		21
Home Equity Line of Credit [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 799		$ 1,375
Home Equity Line of Credit [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		153		381
Home Equity Line of Credit [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		1,570		1,671
Home Equity Line of Credit [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		1,062,988		1,036,184
Home Equity Line of Credit [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 2,522		$ 3,427
Consumer - Other [Member]
Financing Receivable, Past Due [Line Items]
Number Of Financing Receivables Thirty To Fifty Nine Days Past Due | loan	[2]	410		458
Financing Receivable, 90 Days or More Past Due, Still Accruing	[2]	$ 0		$ 0
Loans and Leases Receivable, Gross	[2]	$ 32,864		$ 28,720
Number Of Financing Receivables Total Past Due | loan	[2]	437		515
Number of Financing Receivables Sixty to Eighty Nine Days Past Due | loan	[2]	22		41
Number Of Financing Receivables Equal To Greater Than Ninety Days | loan	[2]	5		16
Financing Receivable, before Allowance for Credit Loss		$ 32,864		$ 28,720
Consumer - Other [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	[2]	487		719
Consumer - Other [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	[2]	205		277
Consumer - Other [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	[2]	12		112
Consumer - Other [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	[2]	32,160		27,612
Consumer - Other [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	[2]	$ 704		$ 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.