Loans and Leases and the Allowance for Credit Losses - Changes in Allowance for Credit Losses (Parenthetical) (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Apr. 01, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision for credit losses		$ 150,000	$ 302,000	$ 270,000	$ 312,000
Charge-offs		$ (162,224)	(75,614)	$ (257,163)	(126,652)
Non PCD Acquired Loans [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Provision for credit losses			242,000		242,000
PCD Acquired Loans [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Charge-offs	$ (33,000)		$ (33,000)		$ (33,000)