Derivatives - Summary of Interest Rate Swap Transactions (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Derivatives Fair Value [Line Items]
Swap assets	$ 14,682	$ 12,481
Accrued Liabilities and Other Liabilities	14,682	12,481
Long [Member] | Interest Rate Swap [Member]
Derivatives Fair Value [Line Items]
Interest Rate Swaps With Loan Customers In An Asset Position Notional Amount	32,877	44,773
Fair Value Of Interest Rate Swaps With Loan Customers In An Asset Position	1,213	2,114
Short [Member] | Interest Rate Swap [Member]
Derivatives Fair Value [Line Items]
Interest Rate Swaps With Loan Customers In A Liability Position Notional Amount	192,227	184,100
Fair Value Of Interest Rate Swaps With Loan Customers In A Liability Position	14,682	12,481
Short [Member] | Financial Institutions [Member]
Derivatives Fair Value [Line Items]
Counterparty Positions With Financial Institutions In An Asset Position Notional Amount	225,104	228,873
Fair Value Of Counterparty Positions With Financial Institutions In An Asset Position	$ 13,469	$ 10,367