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Segment Information (Tables) | 9 Months Ended
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Sep. 30, 2018
Segment Reporting Information, Revenue for Reportable Segment [Abstract] |
Reconciliation Of Sales To Earnings Before Income Taxes by Segment | The following table illustrates certain measurements used by management to assess performance of the segments described above for the three and nine months ended September 30, (in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Net sales: |  |  |  |  |  |  |
Residential Products | $ | 125,839 |  |  | $ | 129,501 |  |  | $ | 360,915 |  |  | $ | 361,304 |
Industrial and Infrastructure Products | 56,033 |  |  | 57,162 |  |  | 172,218 |  |  | 165,806 |
Less: Intersegment sales | (272 | ) |  | (224 | ) |  | (861 | ) |  | (994 | )
Net Industrial and Infrastructure Products | 55,761 |  |  | 56,938 |  |  | 171,357 |  |  | 164,812 |
Renewable Energy and Conservation | 98,486 |  |  | 88,135 |  |  | 229,187 |  |  | 202,690 |
Total consolidated net sales | $ | 280,086 |  |  | $ | 274,574 |  |  | $ | 761,459 |  |  | $ | 728,806 |
Income from operations: |  |  |  |  |  |  |
Residential Products | $ | 20,138 |  |  | $ | 23,764 |  |  | $ | 57,572 |  |  | $ | 61,984 |
Industrial and Infrastructure Products | 2,892 |  |  | 2,554 |  |  | 12,098 |  |  | 5,914 |
Renewable Energy and Conservation | 15,072 |  |  | 11,549 |  |  | 28,690 |  |  | 18,381 |
Unallocated Corporate Expenses | (8,698 | ) |  | (2,174 | ) |  | (22,839 | ) |  | (15,977 | )
Total income from operations | $ | 29,404 |  |  | $ | 35,693 |  |  | $ | 75,521 |  |  | $ | 70,302 |
Disaggregation of Revenue | The following tables illustrate revenue disaggregated by timing of transfer of control to the customer for the three and nine months ended September 30 (in thousands):
| Three Months Ended September 30, 2018
| Residential Products |  | Industrial and Infrastructure Products |  | Renewable Energy and Conservation |  | Total
Net sales: |  |  |  |  |  |  |
Point in Time | $ | 125,118 |  |  | $ | 47,686 |  |  | $ | 10,784 |  |  | $ | 183,588 |
Over Time | 721 |  |  | 8,075 |  |  | 87,702 |  |  | 96,498 |
Total | $ | 125,839 |  |  | $ | 55,761 |  |  | $ | 98,486 |  |  | $ | 280,086 |
| Three Months Ended September 30, 2017
| Residential Products |  | Industrial and Infrastructure Products |  | Renewable Energy and Conservation |  | Total
Net sales: |  |  |  |  |  |  |
Point in Time | $ | 129,501 |  |  | $ | 56,938 |  |  | $ | 7,659 |  |  | $ | 194,098 |
Over Time | — |  |  | — |  |  | 80,476 |  |  | 80,476 |
Total | $ | 129,501 |  |  | $ | 56,938 |  |  | $ | 88,135 |  |  | $ | 274,574 |

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8721-108599 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599 + Details
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