Credit Quality - Schedule of Nonaccrual Loans, Segregated by Class of Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Disclosure Details Of Troubled Debt Restructuring Loan Modification Based On Post Modification Outstanding Balance [Line Items]
Loans on Nonaccrual Status	$ 39,684	$ 58,449
With No Related Allowance for Credit Losses	37,514	56,440
90 Days or More Past Due & Accruing	19,605	18,981
Other Commercial [Member]
Disclosure Details Of Troubled Debt Restructuring Loan Modification Based On Post Modification Outstanding Balance [Line Items]
Loans on Nonaccrual Status	7,277	9,314
With No Related Allowance for Credit Losses	5,894	8,261
90 Days or More Past Due & Accruing	1,919	6,569
Residential Real Estate [Member]
Disclosure Details Of Troubled Debt Restructuring Loan Modification Based On Post Modification Outstanding Balance [Line Items]
Loans on Nonaccrual Status	13,454	15,254
With No Related Allowance for Credit Losses	12,667	14,298
90 Days or More Past Due & Accruing	9,994	8,241
Owner-Occupied [Member] | Commercial Real Estate [Member]
Disclosure Details Of Troubled Debt Restructuring Loan Modification Based On Post Modification Outstanding Balance [Line Items]
Loans on Nonaccrual Status	8,391	12,714
With No Related Allowance for Credit Losses	8,391	12,714
90 Days or More Past Due & Accruing	2,873	611
Nonowner-Occupied [Member] | Commercial Real Estate [Member]
Disclosure Details Of Troubled Debt Restructuring Loan Modification Based On Post Modification Outstanding Balance [Line Items]
Loans on Nonaccrual Status	9,386	18,284
With No Related Allowance for Credit Losses	9,386	18,284
90 Days or More Past Due & Accruing	1,506	545
Construction & Land Development [Member]
Disclosure Details Of Troubled Debt Restructuring Loan Modification Based On Post Modification Outstanding Balance [Line Items]
Loans on Nonaccrual Status	655	2,713
With No Related Allowance for Credit Losses	655	2,713
90 Days or More Past Due & Accruing	0	383
Bankcard [Member] | Consumer [Member]
Disclosure Details Of Troubled Debt Restructuring Loan Modification Based On Post Modification Outstanding Balance [Line Items]
Loans on Nonaccrual Status	0	0
With No Related Allowance for Credit Losses	0	0
90 Days or More Past Due & Accruing	43	187
Other Consumer [Member] | Consumer [Member]
Disclosure Details Of Troubled Debt Restructuring Loan Modification Based On Post Modification Outstanding Balance [Line Items]
Loans on Nonaccrual Status	521	170
With No Related Allowance for Credit Losses	521	170
90 Days or More Past Due & Accruing	$ 3,270	$ 2,445