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Loans and the Allowance for Credit Losses - Loans Identified as TDRs (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	$ 49,300	$ 26,083
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	5,364	41
Commercial Real Estate [Member] | Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	24,217
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	18,644	24,989
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	496	579
Consumer [Member]
Financing Receivable, Modifications [Line Items]
Post-Modification Outstanding Recorded Investment	$ 144	$ 124

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