Commitments and Contingent Liabilities - Summary of Quantitative Information for the Company's Leases (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating lease cost (cost resulting from lease payments)	$ 590,000	$ 488,000
Operating lease - operating cash flows (fixed payments)	598,000
Operating lease - ROU assets	8,557,000
Operating lease - liabilities	$ 10,265,000
Weighted average lease term - operating leases	5 years 1 month 6 days
Weighted average discount rate - operating leases	3.39%
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Interest Receivable and Other Assets