Quarterly report [Sections 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)

v3.26.1
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
Mar. 31, 2026
Dec. 31, 2025
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance Amount $ 70,468 $ 69,903
Percentage of Total Allowance 100.00% 100.00%
Total Loans $ 6,545,466 $ 6,563,368
Percentage of Total Loans 100.00% 100.00%
Residential    
Financing Receivable Allowance For Credit Losses [Line Items]    
Total Loans $ 1,002,223 $ 1,049,872
Real Estate    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance Amount $ 50,108 $ 51,670
Percentage of Total Allowance 71.20% 73.90%
Total Loans $ 5,000,367 $ 5,079,977
Percentage of Total Loans 76.50% 77.50%
Real Estate | Retail    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance Amount $ 9,623 $ 9,999
Percentage of Total Allowance 13.70% 14.30%
Total Loans $ 1,167,739 $ 1,132,439
Percentage of Total Loans 17.80% 17.30%
Real Estate | Hospitality    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance Amount $ 8,098 $ 8,737
Percentage of Total Allowance 11.50% 12.50%
Total Loans $ 865,202 $ 847,989
Percentage of Total Loans 13.20% 12.90%
Real Estate | Office    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance Amount $ 5,253 $ 5,700
Percentage of Total Allowance 7.50% 8.20%
Total Loans $ 486,537 $ 503,268
Percentage of Total Loans 7.40% 7.70%
Real Estate | Other    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance Amount $ 13,629 $ 14,078
Percentage of Total Allowance 19.40% 20.10%
Total Loans $ 1,464,915 $ 1,532,667
Percentage of Total Loans 22.40% 23.40%
Real Estate | Total commercial property loans    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance Amount $ 36,603 $ 38,514
Percentage of Total Allowance 51.90% 55.10%
Total Loans $ 3,984,393 $ 4,016,363
Percentage of Total Loans 60.90% 61.30%
Real Estate | Construction    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance Amount $ 201 $ 208
Percentage of Total Allowance 0.30% 0.30%
Total Loans $ 13,751 $ 13,742
Percentage of Total Loans 0.20% 0.20%
Real Estate | Residential    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance Amount $ 13,304 $ 12,948
Percentage of Total Allowance 18.90% 18.50%
Total Loans $ 1,002,223 $ 1,049,872
Percentage of Total Loans 15.30% 16.00%
Commercial and Industrial    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance Amount $ 8,811 $ 7,792
Percentage of Total Allowance 12.40% 11.10%
Total Loans $ 1,152,544 $ 1,074,908
Percentage of Total Loans 17.60% 16.40%
Equipment Financing Agreements    
Financing Receivable Allowance For Credit Losses [Line Items]    
Allowance Amount $ 11,549 $ 10,441
Percentage of Total Allowance 16.40% 15.00%
Total Loans $ 392,555 $ 408,483
Percentage of Total Loans 6.00% 6.10%