Mergers and Acquisitions - Summary of Reconciliation of Difference Between Purchase Price and Par Value of Purchase Credit Loans Acquired (Detail) - USD ($) $ in Thousands		12 Months Ended
	Dec. 03, 2021	Dec. 31, 2021
Disclosure Detail of Reconciliation of Difference Between Purchase Price and Par Value of Purchase Credit Loans Acquired [Line Items]
Allowance for credit losses at acquisition		$ 12,629
Community Bankers Trust Corporation [Member] | Loans And Leases [Member]
Disclosure Detail of Reconciliation of Difference Between Purchase Price and Par Value of Purchase Credit Loans Acquired [Line Items]
Purchase price of PCD loans and leases at acquisition	$ 360,638
Allowance for credit losses at acquisition	12,629
Non-credit discount at acquisition	3,559
Par value (UPB) of acquired PCD loans and leases at acquisition	$ 376,826