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Allowance for Credit Losses, Credit Quality and Other - Additional Information (Detail)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2024
USD ($)
loan
Mar. 31, 2023
USD ($)
loan
Dec. 31, 2023
USD ($)
loan
Financing Receivable Allowance For Credit Losses [Line Items]      
Provision for credit losses on loans $ 5,500 $ 1,200  
Recovery of credit losses on unfunded commitments (1,000) 0  
Non-accrual loans 67,055   $ 59,971
Loans Past Due Over 90 Days Still Accruing 12,928   4,130
Nonaccrual loans with specific reserve 12,200   2,500
Collateral-dependent impaired loans 105,300   94,900
Interest recognized on impaired loans 685 1,800  
Amount of loan assessed for impairment on a quarterly basis 2,000    
Revolver loans converted to term loans $ 10,300 $ 6,200  
Number of revolving loans convert to term loans | loan 61 64  
Premodification balance $ 668 $ 52 $ 20,200
Number of loans | loan 3 3 21
Ending balance $ 656    
Loans, ending balance 21,500 $ 48  
Loan balance, nonaccrual 1,000    
Loans Past Due 30-59 Days      
Financing Receivable Allowance For Credit Losses [Line Items]      
Loans, ending balance 71    
Past Due      
Financing Receivable Allowance For Credit Losses [Line Items]      
Loans, ending balance 20,500    
Loans Past Due 90 Days or More      
Financing Receivable Allowance For Credit Losses [Line Items]      
Loans, ending balance $ 1,100    
Construction / Land Development and Other Commercial Real Estate Loans | Minimum      
Financing Receivable Allowance For Credit Losses [Line Items]      
Loans collateralized by first liens on real estate amortized period 15 years    
Loans collateralized by first liens on real estate balloon payments due period 1 year    
Construction / Land Development and Other Commercial Real Estate Loans | Maximum      
Financing Receivable Allowance For Credit Losses [Line Items]      
Loans collateralized by first liens on real estate amortized period 30 years    
Loans collateralized by first liens on real estate balloon payments due period 5 years    
Percentage of loan value of improved property 85.00%    
Percentage of loan value of raw land 65.00%    
Percentage of loan value of land to be acquired and developed 75.00%    
Residential real estate loans      
Financing Receivable Allowance For Credit Losses [Line Items]      
Provision for credit losses on loans $ 1,183    
Residential real estate loans | Maximum      
Financing Receivable Allowance For Credit Losses [Line Items]      
Loan-to-value ratio 90.00%    
Commercial and Industrial Loans      
Financing Receivable Allowance For Credit Losses [Line Items]      
Provision for credit losses on loans $ (157)    
Non-accrual loans 10,969   $ 9,982
Loans Past Due Over 90 Days Still Accruing $ 2,311   $ 1,535
Commercial and Industrial Loans | Minimum      
Financing Receivable Allowance For Credit Losses [Line Items]      
Commercial loans terms 1 year    
Inventory financing percentage 50.00%    
Commercial and Industrial Loans | Minimum | Loans Past Due 30-59 Days      
Financing Receivable Allowance For Credit Losses [Line Items]      
Accounts receivable financed percentage 50.00%    
Commercial and Industrial Loans | Maximum      
Financing Receivable Allowance For Credit Losses [Line Items]      
Commercial loans terms 7 years    
Inventory financing percentage 80.00%    
Commercial and Industrial Loans | Maximum | Loans Past Due 30-59 Days      
Financing Receivable Allowance For Credit Losses [Line Items]      
Accounts receivable financed percentage 80.00%