v3.26.3
Business Segments - Summary of Net Sales By Product Line (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Revenue from External Customer [Line Items]          
Net Sales $ 111,699 $ 108,009 $ 322,944 $ 325,378  
Income (Loss) Before Income Taxes 1,480 (1,130) 4,741 (5,308)  
Capital Expenditures     11,809 6,634  
Depreciation and amortization 4,130 7,091 12,614 17,095  
Identifiable Assets 467,706   467,706   $ 495,355
United States [Member]          
Revenue from External Customer [Line Items]          
Net Sales 77,287 67,334 213,584 188,957  
Income (Loss) Before Income Taxes (175) 192 (2,861) 541  
Foreign [Member]          
Revenue from External Customer [Line Items]          
Net Sales 34,412 40,675 109,360 136,421  
Income (Loss) Before Income Taxes 1,655 (1,322) 7,602 (5,849)  
Continuing Operations [Member]          
Revenue from External Customer [Line Items]          
Identifiable Assets 467,706   467,706   495,355
Long-lived Assets 233,174   233,174   251,837
Continuing Operations [Member] | United States [Member]          
Revenue from External Customer [Line Items]          
Long-lived Assets 193,251   193,251   211,461
Continuing Operations [Member] | Foreign [Member]          
Revenue from External Customer [Line Items]          
Long-lived Assets 39,923   39,923   40,376
Operating Segments [Member]          
Revenue from External Customer [Line Items]          
Net Sales 111,699 108,009 322,944 325,378  
Operating Segments [Member] | Forged and Cast Mill Rolls [Member]          
Revenue from External Customer [Line Items]          
Net Sales 62,612 66,455 190,381 207,304  
Capital Expenditures     6,213 4,492  
Depreciation and amortization 3,780 6,807 11,567 16,259  
Operating Segments [Member] | Forged and Cast Mill Rolls [Member] | Continuing Operations [Member]          
Revenue from External Customer [Line Items]          
Identifiable Assets 254,883   254,883   272,303
Operating Segments [Member] | FEP [Member]          
Revenue from External Customer [Line Items]          
Net Sales 6,294 5,012 16,645 14,359  
Operating Segments [Member] | Forged and Cast Engineered Products [Member]          
Revenue from External Customer [Line Items]          
Net Sales 68,906 71,467 207,026 221,663  
Depreciation and amortization 3,780 6,807 11,567 16,259  
Operating Segments [Member] | Air and Liquid Processing [Member]          
Revenue from External Customer [Line Items]          
Net Sales 42,793 36,542 115,918 103,715  
Capital Expenditures     5,596 2,142  
Depreciation and amortization 336 284 1,013 836  
Operating Segments [Member] | Air and Liquid Processing [Member] | Continuing Operations [Member]          
Revenue from External Customer [Line Items]          
Identifiable Assets 205,713   205,713   215,833
Operating Segments [Member] | Air Handling Systems [Member]          
Revenue from External Customer [Line Items]          
Net Sales 16,536 11,169 41,483 35,679  
Operating Segments [Member] | Heat Exchange Coils [Member]          
Revenue from External Customer [Line Items]          
Net Sales 12,574 12,483 38,197 35,307  
Operating Segments [Member] | Centrifugal Pumps [Member]          
Revenue from External Customer [Line Items]          
Net Sales 13,683 $ 12,890 36,238 $ 32,729  
Corporate Costs, Including Other Income (Expense) [Member]          
Revenue from External Customer [Line Items]          
Depreciation and amortization 14   34    
Corporate Costs, Including Other Income (Expense) [Member] | Continuing Operations [Member]          
Revenue from External Customer [Line Items]          
Identifiable Assets $ 7,110   $ 7,110   $ 7,219