Loans and Leases (Information on How Loans and Leases were Modified as a TDR) (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($) loan	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan		25		52
Recorded Investment	$ 50,556	$ 26,826	$ 80,393	$ 30,447
Term extension
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	25,758		55,531
Adjusted interest rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Recorded Investment	$ 64		$ 64
Commercial Portfolio Segment [Member] | Term extension | Commercial non-mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan		0		2
Recorded Investment		$ 0		$ 97
Commercial Portfolio Segment [Member] | Combination - Term extension and interest rate reduction | Commercial non-mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan		3		5
Recorded Investment		$ 351		$ 443
Commercial Portfolio Segment [Member] | Other | Commercial non-mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan		1		1
Recorded Investment		$ 22,964		$ 22,964
Commercial Portfolio Segment [Member] | Other | Equipment financing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan		1		1
Recorded Investment		$ 1,157		$ 1,157
Consumer Portfolio Segment [Member] | Term extension | Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan		1		1
Recorded Investment		$ 893		$ 893
Consumer Portfolio Segment [Member] | Combination - Term extension and interest rate reduction | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan		7		11
Recorded Investment		$ 680		$ 724
Consumer Portfolio Segment [Member] | Other | Residential
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan		2		6
Recorded Investment		$ 308		$ 2,762
Consumer Portfolio Segment [Member] | Other | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan		9		24
Recorded Investment		$ 399		$ 1,333
Consumer Portfolio Segment [Member] | Adjusted interest rate | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modifications, Number of Contracts | loan		1		1
Recorded Investment		$ 74		$ 74