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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, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | $ 19,962 | $ 11,819
Total Loans | 6,020,785 | 5,967,133
Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,302 | 1,124
Total Loans | 926,326 | 734,472
30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 8,963 | 6,215
30-59 Days Past Due | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 935 | 313
60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 2,743 | 2,648
60-89 Days Past Due | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 364 | 804
90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 8,256 | 2,956
90 Days or More Past Due | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 3 | 7
Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 6,000,823 | 5,955,314
Current | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 925,024 | 733,348
Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 2,474 | 1,618
Total Loans | 4,699,341 | 4,567,853
Real Estate | Retail |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 260 |
Total Loans | 1,097,650 | 1,023,608
Real Estate | Hospitality |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 186 |
Total Loans | 705,735 | 646,893
Real Estate | Office |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 575,319 | 499,946
Real Estate | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 726 | 494
Total Loans | 1,309,507 | 1,553,729
Real Estate | Total commercial property loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,172 | 494
Total Loans | 3,688,211 | 3,724,176
Real Estate | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 84,804 | 109,205
Real Estate | Residential |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 926,326 | 734,472
Real Estate | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 2,052 | 313
Real Estate | 30-59 Days Past Due | Retail |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 260 |
Real Estate | 30-59 Days Past Due | Hospitality |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 153 |
Real Estate | 30-59 Days Past Due | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 704 |
Real Estate | 30-59 Days Past Due | Total commercial property loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,117 |
Real Estate | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 397 | 1,298
Real Estate | 60-89 Days Past Due | Hospitality |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 33 |
Real Estate | 60-89 Days Past Due | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable |  | 494
Real Estate | 60-89 Days Past Due | Total commercial property loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 33 | 494
Real Estate | 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 25 | 7
Real Estate | 90 Days or More Past Due | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 22 |
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 |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 4,696,867 | 4,566,235
Real Estate | Current | Retail |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,097,390 | 1,023,608
Real Estate | Current | Hospitality |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 705,549 | 646,893
Real Estate | Current | Office |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 575,319 | 499,946
Real Estate | Current | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 1,308,781 | 1,553,235
Real Estate | Current | Total commercial property loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 3,687,039 | 3,723,682
Real Estate | Current | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 84,804 | 109,205
Commercial and Industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 5,384 | 156
Total Loans | 728,792 | 804,492
Commercial and Industrial | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 384 | 77
Commercial and Industrial | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 151 | 79
Commercial and Industrial | 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 4,849 |
Commercial and Industrial | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | 723,408 | 804,336
Equipment Financing Agreements |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 12,104 | 10,045
Total Loans | 592,652 | 594,788
Equipment Financing Agreements | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 6,527 | 5,825
Equipment Financing Agreements | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 2,195 | 1,271
Equipment Financing Agreements | 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 3,382 | 2,949
Equipment Financing Agreements | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans | $ 580,548 | $ 584,743

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