Schedule of Amounts Recognized in Accumulated Other Comprehensive Income (loss) (Detail) - Postretirement Benefit Plans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure
Prior service cost, before tax	$ (23)	$ (31)
Deferred taxes	(1,691)	(1,689)
Total recognized in other comprehensive income (loss), net of tax	$ (1,714)	$ (1,720)