Loans and Leases (Impaired Collateral) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Collateral Pledged [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	$ 16,600	$ 42,100
Collateral Pledged [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	34,900	60,800
Collateral Value [Member]
Financing Receivable, Impaired [Line Items]
Impaired Financing Receivable, Recorded Investment	$ 86,000	$ 150,300