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Business Segment Information - Net Sales and Income from Operation by Business Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Segment Reporting Information [Line Items] |  |
Net sales | $ 86,011 | $ 74,139
Income from operations | 4,890 | 12,150
Energy Solutions Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 55,188 | 39,973
Income from operations | 9,291 | 3,624
Industrial Solutions Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 18,853 | 18,448
Income from operations | 602 | 1,198
Fluid Handling Solutions Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 11,970 | 15,556
Income from operations | 2,358 | 3,381
Corporate and Other [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales |  | 162
Income from operations | $ (7,361) | 4,533
Inter-segment Elimination [Member] |  |
Segment Reporting Information [Line Items] |  |
Income from operations |  | $ (586)

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