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Mergers and Acquisitions - Additional Information (Detail)
$ / shares in Units, $ in Thousands
6 Months Ended 12 Months Ended
Dec. 03, 2021
USD ($)
$ / shares
shares
Jun. 30, 2022
USD ($)
$ / shares
Dec. 31, 2021
USD ($)
$ / shares
Business Acquisition [Line Items]      
Stock issued during period merger conversion ratio 0.3173    
Par value of Share | $ / shares   $ 2.5 $ 2.5
Loans at consummation   $ 18,994,125 $ 18,051,307
Business combination purchase consideration equity shares issued or issuable value $ 252,321    
Business acquisition allowances for loans and lease losses including reserve for unfunded commitments for assets with credit deterioration     12,629
Loans and leases net of unearned income   18,970,395 $ 18,023,648
Community Bankers Trust Corporation [Member]      
Business Acquisition [Line Items]      
Stock issued during period merger conversion ratio 0.3173    
Business Acquisition, Share Price | $ / shares $ 35.36    
Loans at consummation   1,788,013  
Deposits at consummation   1,517,502  
Business combination aggregate purchase consideration $ 260,304    
Business combination purchase consideration equity shares issued or issuable value 252,321    
Business combination stock options issued $ 7,958    
Business combination number of shares issued | shares 7,135,771    
Business combination cash consideration $ 25    
Business combination intangible assets acquired goodwill 78,849 $ 2,395  
Business combination intangible assets acquired other than goodwill indefinite lived 3,398    
Business acquisition weighted average remaining useful life of purchase credit deterioration of loans   5 years 6 months  
Business acquisition weighted average remaining useful life of non purchase credit deterioration of loans   5 years 7 months 6 days  
Loans and leases net of unearned income   $ 1,282,997  
Community Bankers Trust Corporation [Member] | Including Unfunded Commitements [Member]      
Business Acquisition [Line Items]      
Business acquisition allowances for loans and lease losses including reserve for unfunded commitments 25,920    
Business acquisition allowances for loans and lease losses including reserve for unfunded commitments for assets with credit deterioration 12,788    
Community Bankers Trust Corporation [Member] | Securities Investment [Member]      
Business Acquisition [Line Items]      
Business combination fair value adjustment to purchase consideration 230    
Community Bankers Trust Corporation [Member] | Loans And Leases [Member]      
Business Acquisition [Line Items]      
Business combination fair value adjustment to purchase consideration 7,744    
Business acquisition loans purchase deterioration credit loans acquired discount due to diiferences in purchase consideration 3,559    
Business acquisition allowances for loans and lease losses including reserve for unfunded commitments for assets with credit deterioration 12,629    
Community Bankers Trust Corporation [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration [Member]      
Business Acquisition [Line Items]      
Business acquisition increase in expected credit losses 12,288    
Community Bankers Trust Corporation [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration [Member] | Including Unfunded Commitements [Member]      
Business Acquisition [Line Items]      
Business acquisition allowances for loans and lease losses including reserve for unfunded commitments 13,132    
Community Bankers Trust Corporation [Member] | Financial Asset, Other than Financial Asset Acquired with Credit Deterioration [Member] | Loans And Leases [Member]      
Business Acquisition [Line Items]      
Business combination loans and leases receivable without purchased credit deterioration gross 4,186    
Community Bankers Trust Corporation [Member] | Interest-bearing Deposits [Member]      
Business Acquisition [Line Items]      
Business combination aggregate purchase consideration 2,741    
Business combination fair value adjustment to purchase consideration 492    
Community Bankers Trust Corporation [Member] | Building [Member]      
Business Acquisition [Line Items]      
Business combination fair value adjustment to purchase consideration 6,766    
Community Bankers Trust Corporation [Member] | Land [Member]      
Business Acquisition [Line Items]      
Business combination fair value adjustment to purchase consideration 50    
Community Bankers Trust Corporation [Member] | Trust Preferred Securities Subject to Mandatory Redemption [Member]      
Business Acquisition [Line Items]      
Business combination fair value adjustment to purchase consideration 415    
Business combination unamortized discount on debt useful life   11 years 9 months  
Business combination finite lived tangible assets remaining useful life on premium paid   30 years 9 months  
Business combination interest bearing deposits acquired remaining term on the premium paid   4 years 9 months  
Community Bankers Trust Corporation [Member] | Federal Home Loan Bank Advances [Member]      
Business Acquisition [Line Items]      
Business combination fair value adjustment to purchase consideration $ 457    
Community Bankers Trust Corporation [Member] | Common Stock [Member]      
Business Acquisition [Line Items]      
Par value of Share | $ / shares $ 2.5