Allowance for Credit Losses - Schedule Of Credit Losses Related To Accrued Interest Receivables and Written Off (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivable	$ 50,847	$ 49,037
Less: Allowance for credit losses	0	(8)
Total	50,847	49,029
Other Commercial [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivable	11,551	9,335
Residential Real Estate [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivable	10,091	10,347
Owner-Occupied [Member] | Commercial Real Estate [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivable	3,754	4,172
Nonowner-Occupied [Member] | Commercial Real Estate [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivable	14,316	14,901
Construction [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivable	8,251	7,411
Bankcard [Member] | Consumer [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivable	0	0
Other Consumer [Member] | Consumer [Member]
Accrued Interest Receivables And Written Off Status [Line Items]
Accrued Interest Receivable	$ 2,884	$ 2,871