Loans and Allowance for Credit Losses - Summary of Amortized Cost of Nonaccrual Loans with No Related Allowance (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans	$ 19,817	$ 92,300
Amortized Cost of Nonaccrual Loans with no related Allowance	17,164	85,948
Commercial and Industrial Portfolio [Member]
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans	11,386	82,845
Amortized Cost of Nonaccrual Loans with no related Allowance	9,400	76,493
Commercial Real Estate Portfolio Segment
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans	2,596	4,688
Amortized Cost of Nonaccrual Loans with no related Allowance	2,596	4,688
Consumer Real Estate Portfolio [Member]
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans	4,902	4,210
Amortized Cost of Nonaccrual Loans with no related Allowance	4,235	4,210
Consumer Portfolio [Member]
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans	553	75
Amortized Cost of Nonaccrual Loans with no related Allowance	553	75
Credit Cards Portfolio [Member]
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans	356	457
Amortized Cost of Nonaccrual Loans with no related Allowance	356	457
Leases and Other Portfolio [Member]
Financing Receivable Nonaccrual Status [Line Items]
Nonaccrual Loans	24	25
Amortized Cost of Nonaccrual Loans with no related Allowance	$ 24	$ 25