Loans and the Allowance for Credit Losses - Summary of Loans with MBEFDs (Detail) - ASU 2022-02 Financial Instruments - Credit Losses (Topic 326) - Term Extension [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Financing Receivable, Modifications [Line Items]
Loans that subsequently defaulted	$ 3,008
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modifications [Line Items]
Loans that subsequently defaulted	33
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Loans that subsequently defaulted	$ 2,975