Quarterly report [Sections 13 or 15(d)]

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

v3.26.3
Loans - Analysis of Past Due Loans, Including Loans on Nonaccrual Status, Disaggregated by Loan Class, Non-PCI (Detail) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Financing Receivable, Past Due [Line Items]    
Total Loans $ 6,568,701 $ 6,563,368
Accruing 90 days or more past due loans receivable 0  
Residential    
Financing Receivable, Past Due [Line Items]    
Total Loans 1,001,824 1,049,872
30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 10,563  
30-59 Days Past Due | Residential    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 3,906 4,311
60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 3,615  
60-89 Days Past Due | Residential    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 1,513 1,259
90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 6,170  
90 Days or More Past Due | Residential    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 2,963 1,109
Non-PCI Loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 20,348 33,837
Non-PCI Loans | Residential    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 8,382 6,679
Non-PCI Loans | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   15,165
Non-PCI Loans | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   4,294
Non-PCI Loans | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   14,378
Non-PCI Loans | Current    
Financing Receivable, Past Due [Line Items]    
Total Loans 6,548,353 6,529,531
Non-PCI Loans | Current | Residential    
Financing Receivable, Past Due [Line Items]    
Total Loans 993,442 1,043,193
Real Estate    
Financing Receivable, Past Due [Line Items]    
Total Loans 5,057,488 5,079,977
Real Estate | Retail    
Financing Receivable, Past Due [Line Items]    
Total Loans 1,150,350 1,132,439
Real Estate | Hospitality    
Financing Receivable, Past Due [Line Items]    
Total Loans 883,683 847,989
Real Estate | Office    
Financing Receivable, Past Due [Line Items]    
Total Loans 483,763 503,268
Real Estate | Other    
Financing Receivable, Past Due [Line Items]    
Total Loans 1,526,670 1,532,667
Real Estate | Total commercial property loans    
Financing Receivable, Past Due [Line Items]    
Total Loans 4,044,466 4,016,363
Real Estate | Construction    
Financing Receivable, Past Due [Line Items]    
Total Loans 11,198 13,742
Real Estate | Residential    
Financing Receivable, Past Due [Line Items]    
Total Loans 1,001,824 1,049,872
Real Estate | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 6,822 9,773
Real Estate | 30-59 Days Past Due | Retail    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 2,644 2,002
Real Estate | 30-59 Days Past Due | Hospitality    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 272 3,135
Real Estate | 30-59 Days Past Due | Other    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable   325
Real Estate | 30-59 Days Past Due | Total commercial property loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 2,916 5,462
Real Estate | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 2,485 2,506
Real Estate | 60-89 Days Past Due | Retail    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 708 590
Real Estate | 60-89 Days Past Due | Hospitality    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable (0)  
Real Estate | 60-89 Days Past Due | Other    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 264 657
Real Estate | 60-89 Days Past Due | Total commercial property loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 972 1,247
Real Estate | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 4,805 11,422
Real Estate | 90 Days or More Past Due | Retail    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 421 154
Real Estate | 90 Days or More Past Due | Office    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 337 10,159
Real Estate | 90 Days or More Past Due | Other    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 1,084  
Real Estate | 90 Days or More Past Due | Total commercial property loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 1,842 10,313
Real Estate | Current | Office    
Financing Receivable, Past Due [Line Items]    
Total Loans   503,268
Real Estate | Non-PCI Loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 14,112 23,701
Real Estate | Non-PCI Loans | Retail    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 3,773 2,746
Real Estate | Non-PCI Loans | Hospitality    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 272 3,135
Real Estate | Non-PCI Loans | Office    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 337 10,159
Real Estate | Non-PCI Loans | Other    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 1,348 982
Real Estate | Non-PCI Loans | Total commercial property loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 5,730 17,022
Real Estate | Non-PCI Loans | Current    
Financing Receivable, Past Due [Line Items]    
Total Loans 5,043,376 5,056,276
Real Estate | Non-PCI Loans | Current | Retail    
Financing Receivable, Past Due [Line Items]    
Total Loans 1,146,577 1,129,693
Real Estate | Non-PCI Loans | Current | Hospitality    
Financing Receivable, Past Due [Line Items]    
Total Loans 883,411 844,854
Real Estate | Non-PCI Loans | Current | Office    
Financing Receivable, Past Due [Line Items]    
Total Loans 483,426 493,109
Real Estate | Non-PCI Loans | Current | Other    
Financing Receivable, Past Due [Line Items]    
Total Loans 1,525,322 1,531,685
Real Estate | Non-PCI Loans | Current | Total commercial property loans    
Financing Receivable, Past Due [Line Items]    
Total Loans 4,038,736 3,999,341
Real Estate | Non-PCI Loans | Current | Construction    
Financing Receivable, Past Due [Line Items]    
Total Loans 11,198 13,742
Commercial and Industrial    
Financing Receivable, Past Due [Line Items]    
Total Loans 1,171,614 1,074,908
Commercial and Industrial | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 137 788
Commercial and Industrial | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 88  
Commercial and Industrial | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 76  
Commercial and Industrial | Non-PCI Loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 301 788
Commercial and Industrial | Non-PCI Loans | Current    
Financing Receivable, Past Due [Line Items]    
Total Loans 1,171,313 1,074,120
Equipment Financing Agreements    
Financing Receivable, Past Due [Line Items]    
Total Loans 339,599 408,483
Equipment Financing Agreements | 30-59 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 3,604 4,604
Equipment Financing Agreements | 60-89 Days Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 1,042 1,788
Equipment Financing Agreements | 90 Days or More Past Due    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 1,289 2,956
Equipment Financing Agreements | Non-PCI Loans    
Financing Receivable, Past Due [Line Items]    
Past due loans receivable 5,935 9,348
Equipment Financing Agreements | Non-PCI Loans | Current    
Financing Receivable, Past Due [Line Items]    
Total Loans $ 333,664 $ 399,135