Cash Value of Life Insurance - Summary of Activity in Balance of Cash Value of Life Insurance (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) company employee policy	Dec. 31, 2021 USD ($) company policy employee	Dec. 31, 2020 USD ($)
Insurance [Line Items]
Beginning balance	$ 117,857	$ 118,870
Increase in cash value of life insurance	2,858	2,775	$ 2,949
Gain on death benefit	309	702	498
Insurance proceeds receivable reclassified to other assets	(891)	(4,490)
Ending balance	133,742	117,857	$ 118,870
End of period death benefit	$ 223,427	$ 193,318
Number of policies owned (in policies) | policy	216	176
Insurance companies used (in companies) | company	14	14
Current and former employees and directors covered (in employees) | employee	79	59
FNBB
Insurance [Line Items]
Acquired policies from business combination	$ 13,609	$ 0