Income Taxes - Components of Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current:
Federal									$ 3,052	$ 7,430	$ 7,536
State									287	359	271
Total current									3,339	7,789	7,807
Deferred:
Federal									2,182	227	(1,746)
State									46	(56)	(59)
Total deferred									2,228	171	(1,805)
Total Income Tax	$ 1,332	$ 1,121	$ 1,531	$ 1,583	$ 1,706	$ 2,253	$ 2,050	$ 1,951	$ 5,567	$ 7,960	$ 6,002