Quarterly report pursuant to Section 13 or 15(d)

Loans - Analysis of Past Due Loans, Including Loans on Nonaccrual Status, Disaggregated by Loan Class, Non-PCI (Detail)

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Loans - Analysis of Past Due Loans, Including Loans on Nonaccrual Status, Disaggregated by Loan Class, Non-PCI (Detail) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Financing Receivable, Past Due [Line Items]    
Total Loans $ 6,177,840 $ 6,182,434
Residential    
Financing Receivable, Past Due [Line Items]    
Total Loans   962,661
30-59 Days Past Due | Residential    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   521
60-89 Days Past Due | Residential    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   336
90 Days or More Past Due | Residential    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   1
Current | Residential    
Financing Receivable, Past Due [Line Items]    
Total Loans 970,362  
Non-PCI Loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 25,713 21,451
Non-PCI Loans | Residential    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   858
Non-PCI Loans | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 13,456 8,959
Non-PCI Loans | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 7,759 2,740
Non-PCI Loans | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 4,498 9,752
Non-PCI Loans | Current    
Financing Receivable, Past Due [Line Items]    
Total Loans 6,152,127 6,160,983
Non-PCI Loans | Current | Residential    
Financing Receivable, Past Due [Line Items]    
Total Loans   961,803
Real Estate    
Financing Receivable, Past Due [Line Items]    
Total Loans 4,849,039 4,852,400
Real Estate | Retail    
Financing Receivable, Past Due [Line Items]    
Total Loans 1,091,059 1,107,360
Real Estate | Hospitality    
Financing Receivable, Past Due [Line Items]    
Total Loans 740,160 740,519
Real Estate | Office    
Financing Receivable, Past Due [Line Items]    
Total Loans 575,847 574,981
Real Estate | Other    
Financing Receivable, Past Due [Line Items]    
Total Loans 1,367,395 1,366,534
Real Estate | Total commercial property loans    
Financing Receivable, Past Due [Line Items]    
Total Loans 3,774,461 3,789,394
Real Estate | Construction    
Financing Receivable, Past Due [Line Items]    
Total Loans 104,216 100,345
Real Estate | Residential    
Financing Receivable, Past Due [Line Items]    
Total Loans 970,362 962,661
Real Estate | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   1,745
Real Estate | 30-59 Days Past Due | Retail    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 757 632
Real Estate | 30-59 Days Past Due | Other    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 2,950 592
Real Estate | 30-59 Days Past Due | Total commercial property loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   1,224
Real Estate | 30-59 Days Past Due | Residential    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 2,190  
Real Estate | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   486
Real Estate | 60-89 Days Past Due | Hospitality    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   150
Real Estate | 60-89 Days Past Due | Other    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 366  
Real Estate | 60-89 Days Past Due | Total commercial property loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   150
Real Estate | 60-89 Days Past Due | Residential    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 1,410  
Real Estate | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   23
Real Estate | 90 Days or More Past Due | Hospitality    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   22
Real Estate | 90 Days or More Past Due | Other    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 574  
Real Estate | 90 Days or More Past Due | Total commercial property loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   22
Real Estate | Current | Office    
Financing Receivable, Past Due [Line Items]    
Total Loans 575,847  
Real Estate | Non-PCI Loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 8,247 2,254
Real Estate | Non-PCI Loans | Retail    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 757 632
Real Estate | Non-PCI Loans | Hospitality    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   172
Real Estate | Non-PCI Loans | Other    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 3,890 592
Real Estate | Non-PCI Loans | Total commercial property loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 4,647 1,396
Real Estate | Non-PCI Loans | Residential    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 3,600  
Real Estate | Non-PCI Loans | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 5,897  
Real Estate | Non-PCI Loans | 30-59 Days Past Due | Total commercial property loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 3,707  
Real Estate | Non-PCI Loans | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 1,776  
Real Estate | Non-PCI Loans | 60-89 Days Past Due | Total commercial property loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 366  
Real Estate | Non-PCI Loans | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 574  
Real Estate | Non-PCI Loans | 90 Days or More Past Due | Total commercial property loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 574  
Real Estate | Non-PCI Loans | Current    
Financing Receivable, Past Due [Line Items]    
Total Loans 4,840,792 4,850,146
Real Estate | Non-PCI Loans | Current | Retail    
Financing Receivable, Past Due [Line Items]    
Total Loans 1,090,302 1,106,728
Real Estate | Non-PCI Loans | Current | Hospitality    
Financing Receivable, Past Due [Line Items]    
Total Loans 740,160 740,347
Real Estate | Non-PCI Loans | Current | Office    
Financing Receivable, Past Due [Line Items]    
Total Loans 575,847 574,981
Real Estate | Non-PCI Loans | Current | Other    
Financing Receivable, Past Due [Line Items]    
Total Loans 1,363,505 1,365,942
Real Estate | Non-PCI Loans | Current | Total commercial property loans    
Financing Receivable, Past Due [Line Items]    
Total Loans 3,769,814 3,787,998
Real Estate | Non-PCI Loans | Current | Construction    
Financing Receivable, Past Due [Line Items]    
Total Loans 104,216 100,345
Real Estate | Non-PCI Loans | Current | Residential    
Financing Receivable, Past Due [Line Items]    
Total Loans 966,762  
Commercial and Industrial    
Financing Receivable, Past Due [Line Items]    
Total Loans 774,851 747,819
Commercial and Industrial | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 107 76
Commercial and Industrial | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 3,989 120
Commercial and Industrial | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   5,178
Commercial and Industrial | Non-PCI Loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 4,096 5,374
Commercial and Industrial | Non-PCI Loans | Current    
Financing Receivable, Past Due [Line Items]    
Total Loans 770,755 742,445
Equipment Financing Agreements    
Financing Receivable, Past Due [Line Items]    
Total Loans 553,950 582,215
Equipment Financing Agreements | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 7,452 7,138
Equipment Financing Agreements | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 1,994 2,134
Equipment Financing Agreements | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 3,924 4,551
Equipment Financing Agreements | Non-PCI Loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 13,370 13,823
Equipment Financing Agreements | Non-PCI Loans | Current    
Financing Receivable, Past Due [Line Items]    
Total Loans $ 540,580 $ 568,392