v3.26.1
Business Segments - Summary of Net Sales By Product Line (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Revenue from External Customer [Line Items]      
Net Sales $ 108,327 $ 104,265  
Income Before Income Taxes 435 1,950  
Capital Expenditures 3,385 2,200  
Depreciation and amortization 4,258 4,636  
Identifiable Assets 497,207   $ 495,355
United States [Member]      
Revenue from External Customer [Line Items]      
Net Sales 70,429 59,896  
Income Before Income Taxes (2,023) 397  
Foreign [Member]      
Revenue from External Customer [Line Items]      
Net Sales 37,898 44,369  
Income Before Income Taxes 2,458 1,553  
Continuing Operations [Member]      
Revenue from External Customer [Line Items]      
Identifiable Assets 497,207   495,355
Long-lived Assets 244,249   251,837
Continuing Operations [Member] | United States [Member]      
Revenue from External Customer [Line Items]      
Long-lived Assets 206,016   211,461
Continuing Operations [Member] | Foreign [Member]      
Revenue from External Customer [Line Items]      
Long-lived Assets 38,233   40,376
Operating Segments [Member]      
Revenue from External Customer [Line Items]      
Net Sales 108,327 104,265  
Operating Segments [Member] | Forged and Cast Mill Rolls [Member]      
Revenue from External Customer [Line Items]      
Net Sales 66,368 68,622  
Capital Expenditures 1,122 1,399  
Depreciation and amortization 3,924 4,368  
Operating Segments [Member] | Forged and Cast Mill Rolls [Member] | Continuing Operations [Member]      
Revenue from External Customer [Line Items]      
Identifiable Assets 274,084   272,303
Operating Segments [Member] | FEP [Member]      
Revenue from External Customer [Line Items]      
Net Sales 4,441 3,665  
Operating Segments [Member] | Forged and Cast Engineered Products [Member]      
Revenue from External Customer [Line Items]      
Net Sales 70,809 72,287  
Depreciation and amortization 3,924 4,368  
Operating Segments [Member] | Air and Liquid Processing [Member]      
Revenue from External Customer [Line Items]      
Net Sales 37,518 31,978  
Capital Expenditures 2,263 801  
Depreciation and amortization 327 268  
Operating Segments [Member] | Air and Liquid Processing [Member] | Continuing Operations [Member]      
Revenue from External Customer [Line Items]      
Identifiable Assets 215,887   215,833
Operating Segments [Member] | Air Handling Systems [Member]      
Revenue from External Customer [Line Items]      
Net Sales 13,043 10,628  
Operating Segments [Member] | Heat Exchange Coils [Member]      
Revenue from External Customer [Line Items]      
Net Sales 13,068 11,525  
Operating Segments [Member] | Centrifugal Pumps [Member]      
Revenue from External Customer [Line Items]      
Net Sales 11,407 $ 9,825  
Corporate Costs, Including Other Income (Expense) [Member]      
Revenue from External Customer [Line Items]      
Depreciation and amortization 7    
Corporate Costs, Including Other Income (Expense) [Member] | Continuing Operations [Member]      
Revenue from External Customer [Line Items]      
Identifiable Assets $ 7,236   $ 7,219