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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
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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