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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 | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total Loans | $ 6,528,259 | $ 6,251,377
Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,043,577 | 951,302
30-59 Days Past Due | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 3,961 | 5,129
60-89 Days Past Due | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable |  | 2,975
90 Days or More Past Due | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 299 | 980
Non-PCI Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 28,907 | 29,776
Non-PCI Loans | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 4,260 | 9,084
Non-PCI Loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 9,953 | 14,298
Non-PCI Loans | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 3,310 | 6,990
Non-PCI Loans | 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 15,644 | 8,488
Non-PCI Loans | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 6,499,352 | 6,221,601
Non-PCI Loans | Current | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,039,317 | 942,218
Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 5,058,868 | 4,900,924
Real Estate | Retail |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,106,438 | 1,068,978
Real Estate | Hospitality |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 823,033 | 848,134
Real Estate | Office |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 533,031 | 568,861
Real Estate | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,482,826 | 1,385,051
Real Estate | Total commercial property loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 3,945,328 | 3,871,024
Real Estate | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 69,963 | 78,598
Real Estate | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,043,577 | 951,302
Real Estate | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 5,667 |
Real Estate | 30-59 Days Past Due | Retail |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 247 | 975
Real Estate | 30-59 Days Past Due | Hospitality |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 0 | 516
Real Estate | 30-59 Days Past Due | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,459 | 1,288
Real Estate | 30-59 Days Past Due | Total commercial property loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,706 |
Real Estate | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,027 |
Real Estate | 60-89 Days Past Due | Retail |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,027 | 855
Real Estate | 60-89 Days Past Due | Hospitality |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 0 | (50)
Real Estate | 60-89 Days Past Due | Office |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 0 | 212
Real Estate | 60-89 Days Past Due | Total commercial property loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,027 |
Real Estate | 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 11,818 |
Real Estate | 90 Days or More Past Due | Retail |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 554 | 254
Real Estate | 90 Days or More Past Due | Hospitality |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 399 | 216
Real Estate | 90 Days or More Past Due | Office |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 10,566 |
Real Estate | 90 Days or More Past Due | Total commercial property loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 11,519 |
Real Estate | Current | Office |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 533,031 |
Real Estate | Current | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans |  | 1,385,051
Real Estate | Non-PCI Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 18,512 | 13,350
Real Estate | Non-PCI Loans | Retail |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,828 | 2,084
Real Estate | Non-PCI Loans | Hospitality |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 399 | 682
Real Estate | Non-PCI Loans | Office |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 10,566 | 212
Real Estate | Non-PCI Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,459 | 1,288
Real Estate | Non-PCI Loans | Total commercial property loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 14,252 | 4,266
Real Estate | Non-PCI Loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable |  | 7,908
Real Estate | Non-PCI Loans | 30-59 Days Past Due | Total commercial property loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable |  | 2,779
Real Estate | Non-PCI Loans | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable |  | 3,992
Real Estate | Non-PCI Loans | 60-89 Days Past Due | Total commercial property loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable |  | 1,017
Real Estate | Non-PCI Loans | 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable |  | 1,450
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 |  | 470
Real Estate | Non-PCI Loans | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 5,040,356 | 4,887,574
Real Estate | Non-PCI Loans | Current | Retail |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,104,610 | 1,066,894
Real Estate | Non-PCI Loans | Current | Hospitality |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 822,634 | 847,452
Real Estate | Non-PCI Loans | Current | Office |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 522,465 | 568,649
Real Estate | Non-PCI Loans | Current | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,481,367 | 1,383,763
Real Estate | Non-PCI Loans | Current | Total commercial property loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 3,931,076 | 3,866,758
Real Estate | Non-PCI Loans | Current | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 69,963 | 78,598
Commercial and Industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,052,522 | 863,431
Commercial and Industrial | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 662 | 236
Commercial and Industrial | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable |  | 132
Commercial and Industrial | 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 0 | 1,278
Commercial and Industrial | Non-PCI Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 662 | 1,646
Commercial and Industrial | Non-PCI Loans | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,051,860 | 861,785
Equipment Financing Agreements |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 416,869 | 487,022
Equipment Financing Agreements | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 3,624 | 6,154
Equipment Financing Agreements | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 2,283 | 2,866
Equipment Financing Agreements | 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 3,826 | 5,760
Equipment Financing Agreements | Non-PCI Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 9,733 | 14,780
Equipment Financing Agreements | Non-PCI Loans | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | $ 407,136 | $ 472,242

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