Business Segments - Business Segment Net Sales and Income before Income Taxes (Parenthetical) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue from External Customer [Line Items]
Credit for asbestos litigation	$ (191)	$ 0	$ (191)	$ 0
Forged And Cast Engineered Products [Member]
Revenue from External Customer [Line Items]
Proceeds from reimbursement of past energy costs			1,874
Air and Liquid Processing [Member]
Revenue from External Customer [Line Items]
Credit for asbestos litigation	$ 191		$ 191