Quarterly report pursuant to Section 13 or 15(d)

Loans - Allowance for Credit Losses by Portfolio Segment as a Percentage of Recorded Total Allowance for Credit Losses and Aggregate Recorded Investment of Loans Receivable (Detail)

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Loans - Allowance for Credit Losses by Portfolio Segment as a Percentage of Recorded Total Allowance for Credit Losses and Aggregate Recorded Investment of Loans Receivable (Detail) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Sep. 30, 2023
Dec. 31, 2022
Financing Receivable Allowance For Credit Losses [Line Items]        
Allowance Amount $ 69,163 $ 69,462 $ 67,313 $ 71,523
Percentage of Total Allowance 100.00% 100.00%    
Total Loans $ 6,257,744 $ 6,182,434    
Percentage of Total Loans 100.00% 100.00%    
Residential        
Financing Receivable Allowance For Credit Losses [Line Items]        
Total Loans $ 939,285 $ 962,661    
Real Estate        
Financing Receivable Allowance For Credit Losses [Line Items]        
Allowance Amount $ 43,694 $ 45,499    
Percentage of Total Allowance 63.30% 65.50%    
Total Loans $ 4,871,373 $ 4,852,400    
Percentage of Total Loans 77.90% 78.50%    
Real Estate | Retail        
Financing Receivable Allowance For Credit Losses [Line Items]        
Allowance Amount $ 10,226 $ 10,264    
Percentage of Total Allowance 14.80% 14.80%    
Total Loans $ 1,087,433 $ 1,107,360    
Percentage of Total Loans 17.40% 17.90%    
Real Estate | Hospitality        
Financing Receivable Allowance For Credit Losses [Line Items]        
Allowance Amount $ 13,971 $ 15,534    
Percentage of Total Allowance 20.20% 22.40%    
Total Loans $ 819,017 $ 740,519    
Percentage of Total Loans 13.10% 12.00%    
Real Estate | Office        
Financing Receivable Allowance For Credit Losses [Line Items]        
Allowance Amount $ 3,879 $ 3,024    
Percentage of Total Allowance 5.60% 4.40%    
Total Loans $ 571,580 $ 574,981    
Percentage of Total Loans 9.10% 9.30%    
Real Estate | Other        
Financing Receivable Allowance For Credit Losses [Line Items]        
Allowance Amount $ 8,004 $ 8,663    
Percentage of Total Allowance 11.60% 12.40%    
Total Loans $ 1,369,294 $ 1,366,534    
Percentage of Total Loans 21.90% 22.10%    
Real Estate | Total commercial property loans        
Financing Receivable Allowance For Credit Losses [Line Items]        
Allowance Amount $ 36,080 $ 37,485    
Percentage of Total Allowance 52.20% 54.00%    
Total Loans $ 3,847,324 $ 3,789,394    
Percentage of Total Loans 61.50% 61.30%    
Real Estate | Construction        
Financing Receivable Allowance For Credit Losses [Line Items]        
Allowance Amount $ 1,698 $ 2,756    
Percentage of Total Allowance 2.50% 4.00%    
Total Loans $ 84,764 $ 100,345    
Percentage of Total Loans 1.40% 1.60%    
Real Estate | Residential        
Financing Receivable Allowance For Credit Losses [Line Items]        
Allowance Amount $ 5,916 $ 5,258    
Percentage of Total Allowance 8.60% 7.50%    
Total Loans $ 939,285 $ 962,661    
Percentage of Total Loans 15.00% 15.60%    
Commercial and Industrial        
Financing Receivable Allowance For Credit Losses [Line Items]        
Allowance Amount $ 9,783 $ 10,257    
Percentage of Total Allowance 14.00% 14.80%    
Total Loans $ 879,092 $ 747,819    
Percentage of Total Loans 14.00% 12.10%    
Equipment Financing Agreements        
Financing Receivable Allowance For Credit Losses [Line Items]        
Allowance Amount $ 15,686 $ 13,706    
Percentage of Total Allowance 22.70% 19.70%    
Total Loans $ 507,279 $ 582,215    
Percentage of Total Loans 8.10% 9.40%