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Allowance for Credit Losses, Credit Quality and Other - Additional Information (Detail)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2024
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2024
USD ($)
loan
Jun. 30, 2023
USD ($)
loan
Dec. 31, 2023
USD ($)
loan
Financing Receivable Allowance For Credit Losses [Line Items]          
Provision for credit losses on loans $ 8,000 $ 2,300 $ 13,500 $ 3,500  
Recovery of credit losses on unfunded commitments 0 0 (1,000) 0  
Non-accrual loans 78,090   78,090   $ 59,971
Loans Past Due Over 90 Days Still Accruing 8,251   8,251   4,130
Nonaccrual loans with specific reserve 2,300   2,300   2,500
Collateral-dependent impaired loans 95,700   95,700   94,900
Interest recognized on impaired loans 368 1,500 737 3,000  
Amount of loan assessed for impairment on a quarterly basis     2,000    
Revolver loans converted to term loans     $ 27,300 $ 21,800  
Number of revolving loans convert to term loans | loan     114 120  
Premodification balance     $ 1,000 $ 18,400  
Number of loans | loan     8 13  
Ending balance     $ 968    
Loans, ending balance   18,100   $ 18,100  
Borrowers Experiencing Financial Difficulty          
Financing Receivable Allowance For Credit Losses [Line Items]          
Premodification balance         $ 2,100
Number of loans | loan         16
Loans, ending balance 3,900   3,900    
Loan balance, nonaccrual 1,200   1,200    
Loans Past Due 30-59 Days | Borrowers Experiencing Financial Difficulty          
Financing Receivable Allowance For Credit Losses [Line Items]          
Loans, ending balance 77   77    
Past Due | Borrowers Experiencing Financial Difficulty          
Financing Receivable Allowance For Credit Losses [Line Items]          
Loans, ending balance 2,700   $ 2,700    
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 (5,566) 316 $ (4,383)    
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 (19,619) $ 1,757 $ (19,776)    
Non-accrual loans 9,226   9,226   $ 9,982
Loans Past Due Over 90 Days Still Accruing $ 2,463   $ 2,463   $ 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%   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%   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%   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%   80.00%