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Loans and Allowance for Credit Losses - Summary of Amortized Cost of Nonaccrual Loans with No Related Allowance (Detail) - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025
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Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual Loans | $ 151,250 | $ 144,666
Amortized Cost of Nonaccrual Loans with no related Allowance | 76,877 | 76,789
Commercial and Industrial Portfolio [Member] |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual Loans | 55,975 | 26,633
Amortized Cost of Nonaccrual Loans with no related Allowance | 12,640 | 10,870
Commercial Real Estate Portfolio [Member] |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual Loans | 63,436 | 86,838
Amortized Cost of Nonaccrual Loans with no related Allowance | 33,407 | 35,973
Consumer Real Estate Portfolio [Member] |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual Loans | 31,103 | 29,910
Amortized Cost of Nonaccrual Loans with no related Allowance | 30,094 | 28,661
Consumer Portfolio [Member] |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual Loans | 147 | 777
Amortized Cost of Nonaccrual Loans with no related Allowance | 147 | 777
Credit Cards Portfolio [Member] |  |
Financing Receivable Nonaccrual Status [Line Items] |  |
Nonaccrual Loans | 589 | 508
Amortized Cost of Nonaccrual Loans with no related Allowance | $ 589 | $ 508

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