Net Sales and Income (Loss) Before Income Taxes - Net Sales and Income Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation Of Revenue [Line Items]
Net sales	$ 104,803	$ 94,426
Forged and Cast Mill Rolls [Member]
Disaggregation Of Revenue [Line Items]
Net sales	71,699	60,707
FEP [Member]
Disaggregation Of Revenue [Line Items]
Net sales	5,099	14,052
Heat Exchange Coils [Member]
Disaggregation Of Revenue [Line Items]
Net sales	10,635	7,300
Air Handling Systems [Member]
Disaggregation Of Revenue [Line Items]
Net sales	9,204	6,609
Centrifugal Pumps [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 8,166	$ 5,758