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Business Segment Information - Net Sales and Income from Operation by Business Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 99,982 | $ 101,596 | $ 112,258 | $ 103,175 | $ 101,246 | $ 98,230 | $ 86,961 | $ 80,985 | $ 417,011 | $ 367,422 | $ 263,217
(Loss) income from operations |  |  |  |  |  |  |  |  | (25,562) | 4,949 | 21,663
Environmental Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 153,344 | 158,371 | 127,707
(Loss) income from operations |  |  |  |  |  |  |  |  | 15,652 | 17,021 | 16,803
Energy Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 203,376 | 142,150 | 70,285
(Loss) income from operations |  |  |  |  |  |  |  |  | 23,575 | 3,488 | 7,799
Fluid Handling and Filtration Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 61,783 | 67,610 | 65,638
(Loss) income from operations |  |  |  |  |  |  |  |  | (36,209) | 11,741 | 13,188
Corporate and Other [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | (1,492) | (709) | (413)
(Loss) income from operations |  |  |  |  |  |  |  |  | (26,981) | (26,592) | (14,297)
Inter-segment Elimination [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
(Loss) income from operations |  |  |  |  |  |  |  |  | $ (1,599) | $ (709) | $ (1,830)

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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