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Loans - Analysis of Past Due Loans, Disaggregated by Loan Class, Non-PCI (Detail) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | $ 11,190 | $ 53,640
Loans receivable | 4,858,865 | 4,880,168
Accruing 90 days or more past due loans receivable | 13 |
30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 6,477 | 9,026
60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,545 | 15,081
90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 3,168 | 29,533
Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 4,847,675 | 4,826,528
Real Estate |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 5,118 | 30,332
Loans receivable | 3,883,366 | 3,699,649
Real Estate | Retail |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 942,996 | 824,606
Real Estate | Hospitality |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable |  | 11,076
Loans receivable | 725,864 | 859,953
Real Estate | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 2,073 | 731
Loans receivable | 1,783,477 | 1,610,377
Real Estate | Total commercial property loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 2,073 | 11,807
Loans receivable | 3,452,337 | 3,294,936
Real Estate | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable |  | 12,807
Loans receivable | 76,168 | 58,882
Real Estate | Residential/Consumer Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 3,045 | 5,718
Loans receivable | 354,861 | 345,831
Real Estate | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 3,586 | 4,693
Real Estate | 30-59 Days Past Due | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,945 |
Real Estate | 30-59 Days Past Due | Total commercial property loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,945 |
Real Estate | 30-59 Days Past Due | Residential/Consumer Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,641 | 4,693
Real Estate | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable |  | 13,268
Real Estate | 60-89 Days Past Due | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable |  | 12,807
Real Estate | 60-89 Days Past Due | Residential/Consumer Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable |  | 461
Real Estate | 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,532 | 12,371
Real Estate | 90 Days or More Past Due | Hospitality |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable |  | 11,076
Real Estate | 90 Days or More Past Due | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 128 | 731
Real Estate | 90 Days or More Past Due | Total commercial property loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 128 | 11,807
Real Estate | 90 Days or More Past Due | Residential/Consumer Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,404 | 564
Real Estate | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 3,878,248 | 3,669,317
Real Estate | Current | Retail |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 942,996 | 824,606
Real Estate | Current | Hospitality |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 725,864 | 848,877
Real Estate | Current | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 1,781,404 | 1,609,646
Real Estate | Current | Total commercial property loans |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 3,450,264 | 3,283,129
Real Estate | Current | Construction |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 76,168 | 46,075
Real Estate | Current | Residential/Consumer Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 351,816 | 340,113
Commercial and Industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 13 | 12,796
Loans receivable | 516,357 | 757,255
Commercial and Industrial | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable |  | 282
Commercial and Industrial | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 13 | 27
Commercial and Industrial | 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable |  | 12,487
Commercial and Industrial | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | 516,344 | 744,459
Leases Receivable |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 6,059 | 10,512
Loans receivable | 459,142 | 423,264
Accruing 90 days or more past due loans receivable | 13 |
Leases Receivable | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 2,891 | 4,051
Leases Receivable | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,532 | 1,786
Leases Receivable | 90 Days or More Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Past due loans receivable | 1,636 | 4,675
Leases Receivable | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Loans receivable | $ 453,083 | $ 412,752

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