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Business Segments - Summary of Net Sales By Product Line (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Revenue from External Customer [Line Items] |  |  |  |  |
Net Sales | $ 108,009 | $ 96,166 | $ 325,378 | $ 317,369 |
(Loss) Income Before Income Taxes | (1,130) | (818) | (5,308) | 845 |
Capital Expenditures |  |  | 6,634 | 8,443 |
Depreciation and amortization | 7,091 | 4,586 | 17,095 | 13,954 |
Identifiable Assets | 524,413 |  | 524,413 |  | $ 530,896
U.S. [Member] |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Net Sales | 67,334 | 59,556 | 188,957 | 202,236 |
(Loss) Income Before Income Taxes | 192 | 837 | 541 | (181) |
Foreign [Member] |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Net Sales | 40,675 | 36,610 | 136,421 | 115,133 |
(Loss) Income Before Income Taxes | (1,322) | (1,655) | (5,849) | 1,026 |
Continuing Operations [Member] |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Identifiable Assets | 524,413 |  | 524,413 |  | 530,896
Long-lived Assets | 272,007 |  | 272,007 |  | 291,258
Continuing Operations [Member] | U.S. [Member] |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Long-lived Assets | 215,836 |  | 215,836 |  | 235,785
Continuing Operations [Member] | Foreign [Member] |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Long-lived Assets | 56,171 |  | 56,171 |  | 55,473
Operating Segments [Member] |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Net Sales | 108,009 | 96,166 | 325,378 | 317,369 |
Operating Segments [Member] | Forged and Cast Mill Rolls [Member] |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Net Sales | 66,455 | 63,833 | 207,304 | 209,876 |
Operating Segments [Member] | FEP [Member] |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Net Sales | 5,012 | 3,370 | 14,359 | 10,229 |
Operating Segments [Member] | Forged and Cast Engineered Products [Member] |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Net Sales | 71,467 | 67,203 | 221,663 | 220,105 |
Capital Expenditures |  |  | 4,492 | 5,347 |
Depreciation and amortization | 6,807 | 4,340 | 16,259 | 13,224 |
Operating Segments [Member] | Forged and Cast Engineered Products [Member] | Continuing Operations [Member] |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Identifiable Assets | 297,501 |  | 297,501 |  | 289,129
Operating Segments [Member] | Air and Liquid Processing [Member] |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Net Sales | 36,542 | 28,963 | 103,715 | 97,264 |
Capital Expenditures |  |  | 2,142 | 3,096 |
Depreciation and amortization | 284 | 246 | 836 | 730 |
Operating Segments [Member] | Air and Liquid Processing [Member] | Continuing Operations [Member] |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Identifiable Assets | 219,136 |  | 219,136 |  | 230,171
Operating Segments [Member] | Air Handling Systems [Member] |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Net Sales | 11,169 | 8,853 | 35,679 | 35,406 |
Operating Segments [Member] | Heat Exchange Coils [Member] |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Net Sales | 12,483 | 10,824 | 35,307 | 33,626 |
Operating Segments [Member] | Centrifugal Pumps [Member] |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Net Sales | 12,890 | $ 9,286 | 32,729 | $ 28,232 |
Other Expense, Including Corporate Costs - Net [Member] | Continuing Operations [Member] |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Identifiable Assets | $ 7,776 |  | $ 7,776 |  | $ 11,596

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