Revenue - Net Sales (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Disaggregation Of Revenue [Line Items]
Net sales	$ 390,189	$ 344,920	[1]
Forged and Cast Mill Rolls [Member]
Disaggregation Of Revenue [Line Items]
Net sales	256,559	234,926
Forged Engineered Products [Member]
Disaggregation Of Revenue [Line Items]
Net sales	42,925	25,278
Heat Exchange Coils [Member]
Disaggregation Of Revenue [Line Items]
Net sales	31,395	24,372
Air Handling Systems [Member]
Disaggregation Of Revenue [Line Items]
Net sales	29,436	26,477
Centrifugal Pumps [Member]
Disaggregation Of Revenue [Line Items]
Net sales	29,874	33,867
U.S. [Member]
Disaggregation Of Revenue [Line Items]
Net sales	204,952	178,090
Foreign [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 185,237	$ 166,830

[1] Costs of products sold (excluding depreciation and amortization) and subsequent subtotals and totals along with net loss per share for 2021 were adjusted to include inventory costs using the FIFO basis of costing. See Note 2.