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Credit Quality - Schedule of Amortized Cost Basis of Loan Modifications Made to Borrowers (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis Loan Modification Term Extension And Interest Rate Reduction	$ 1,000	$ 2,400
Amortized Cost Basis Loan Modification Term Extension And Permanent Delay	$ 3,466	$ 168
% of Total Class of Financing Receivable	0.13%	0.04%
Amortized Cost Basis of Modified Loans that Subsequently Defaulted in Term Extension Interest Rate Reduction		$ 0
Amortized Cost Basis of Modified Loans that Subsequently Defaulted in Term Extension Payment Delay		$ 674
% of Total Class of Financing Receivable		0.00%
Term Extension [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	$ 15,475	$ 6,447
Financing Receivable, Modified, Subsequent Default		0
Other than insignificant payment delay [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	7,160	0
Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	4,616	0
Financing Receivable, Modified, Subsequent Default		0
Commercial Real Estate [Member] | Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis Loan Modification Term Extension And Interest Rate Reduction	0	0
Amortized Cost Basis Loan Modification Term Extension And Permanent Delay	$ 3,466	$ 0
% of Total Class of Financing Receivable	0.54%	0.03%
Amortized Cost Basis of Modified Loans that Subsequently Defaulted in Term Extension Interest Rate Reduction		$ 0
Amortized Cost Basis of Modified Loans that Subsequently Defaulted in Term Extension Payment Delay		$ 0
% of Total Class of Financing Receivable		0.00%
Commercial Real Estate [Member] | Owner-Occupied [Member] | Term Extension [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	$ 8,015	$ 445
Financing Receivable, Modified, Subsequent Default		0
Commercial Real Estate [Member] | Owner-Occupied [Member] | Other than insignificant payment delay [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	0	0
Commercial Real Estate [Member] | Owner-Occupied [Member] | Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	0	0
Financing Receivable, Modified, Subsequent Default		0
Commercial Real Estate [Member] | Nonowner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis Loan Modification Term Extension And Interest Rate Reduction	0	0
Amortized Cost Basis Loan Modification Term Extension And Permanent Delay	$ 0	$ 0
% of Total Class of Financing Receivable	0.23%	0.08%
Amortized Cost Basis of Modified Loans that Subsequently Defaulted in Term Extension Interest Rate Reduction		$ 0
Amortized Cost Basis of Modified Loans that Subsequently Defaulted in Term Extension Payment Delay		$ 0
% of Total Class of Financing Receivable		0.00%
Commercial Real Estate [Member] | Nonowner-Occupied [Member] | Term Extension [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	$ 7,460	$ 5,765
Financing Receivable, Modified, Subsequent Default		0
Commercial Real Estate [Member] | Nonowner-Occupied [Member] | Other than insignificant payment delay [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	7,160	0
Commercial Real Estate [Member] | Nonowner-Occupied [Member] | Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	4,616	0
Financing Receivable, Modified, Subsequent Default		0
Other Commercial [Member]
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis Loan Modification Term Extension And Interest Rate Reduction	1,000	2,400
Amortized Cost Basis Loan Modification Term Extension And Permanent Delay	$ 0	$ 0
% of Total Class of Financing Receivable	0.03%	0.00%
Amortized Cost Basis of Modified Loans that Subsequently Defaulted in Term Extension Interest Rate Reduction		$ 0
Amortized Cost Basis of Modified Loans that Subsequently Defaulted in Term Extension Payment Delay		$ 0
% of Total Class of Financing Receivable		0.00%
Other Commercial [Member] | Term Extension [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	$ 0	$ 0
Financing Receivable, Modified, Subsequent Default		0
Other Commercial [Member] | Other than insignificant payment delay [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	0	0
Other Commercial [Member] | Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	0	0
Financing Receivable, Modified, Subsequent Default		0
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis Loan Modification Term Extension And Interest Rate Reduction	0	0
Amortized Cost Basis Loan Modification Term Extension And Permanent Delay	$ 0	$ 168
% of Total Class of Financing Receivable	0.00%	0.06%
Amortized Cost Basis of Modified Loans that Subsequently Defaulted in Term Extension Interest Rate Reduction		$ 0
Amortized Cost Basis of Modified Loans that Subsequently Defaulted in Term Extension Payment Delay		$ 0
% of Total Class of Financing Receivable		0.00%
Residential Real Estate [Member] | Term Extension [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	$ 0	$ 185
Financing Receivable, Modified, Subsequent Default		0
Residential Real Estate [Member] | Other than insignificant payment delay [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	0	0
Residential Real Estate [Member] | Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	0	0
Financing Receivable, Modified, Subsequent Default		0
Construction & Land Development [Member]
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis Loan Modification Term Extension And Interest Rate Reduction	0	0
Amortized Cost Basis Loan Modification Term Extension And Permanent Delay	$ 0	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%
Amortized Cost Basis of Modified Loans that Subsequently Defaulted in Term Extension Interest Rate Reduction		$ 0
Amortized Cost Basis of Modified Loans that Subsequently Defaulted in Term Extension Payment Delay		$ 674
% of Total Class of Financing Receivable		0.02%
Construction & Land Development [Member] | Term Extension [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	$ 0	$ 52
Financing Receivable, Modified, Subsequent Default		0
Construction & Land Development [Member] | Other than insignificant payment delay [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	0	0
Construction & Land Development [Member] | Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	0	0
Financing Receivable, Modified, Subsequent Default		0
Consumer [Member] | Bankcard [Member]
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis Loan Modification Term Extension And Interest Rate Reduction	0	0
Amortized Cost Basis Loan Modification Term Extension And Permanent Delay	$ 0	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%
Amortized Cost Basis of Modified Loans that Subsequently Defaulted in Term Extension Interest Rate Reduction		$ 0
Amortized Cost Basis of Modified Loans that Subsequently Defaulted in Term Extension Payment Delay		$ 0
% of Total Class of Financing Receivable		0.00%
Consumer [Member] | Bankcard [Member] | Term Extension [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	$ 0	$ 0
Financing Receivable, Modified, Subsequent Default		0
Consumer [Member] | Bankcard [Member] | Other than insignificant payment delay [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	0	0
Consumer [Member] | Bankcard [Member] | Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	0	0
Financing Receivable, Modified, Subsequent Default		0
Consumer [Member] | Other Consumer [Member]
Financing Receivable, Modifications [Line Items]
Amortized Cost Basis Loan Modification Term Extension And Interest Rate Reduction	0	0
Amortized Cost Basis Loan Modification Term Extension And Permanent Delay	$ 0	$ 0
% of Total Class of Financing Receivable	0.00%	0.00%
Amortized Cost Basis of Modified Loans that Subsequently Defaulted in Term Extension Interest Rate Reduction		$ 0
Amortized Cost Basis of Modified Loans that Subsequently Defaulted in Term Extension Payment Delay		$ 0
% of Total Class of Financing Receivable		0.00%
Consumer [Member] | Other Consumer [Member] | Term Extension [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	$ 0	$ 0
Financing Receivable, Modified, Subsequent Default		0
Consumer [Member] | Other Consumer [Member] | Other than insignificant payment delay [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	0	0
Consumer [Member] | Other Consumer [Member] | Interest Rate Reduction [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modified	$ 0	0
Financing Receivable, Modified, Subsequent Default		$ 0

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