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Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2017
Segment Information |
Summary of the annual percentage of net sales by product category. |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Insulation |  | 72 | % |  | 71 | % |  | 72 | %
Rain gutters |  | 7 |  |  | 7 |  |  | 7 |
Accessories |  | 5 |  |  | 5 |  |  | 4 |
Afterpaint (shower enclosures, closet shelving, mirrors/glass, bath accessories, etc.) |  | 4 |  |  | 3 |  |  | 4 |
Fireproofing and firestopping |  | 3 |  |  | 2 |  |  | 2 |
Garage doors |  | 2 |  |  | 2 |  |  | 3 |
Fireplaces |  | 2 |  |  | 2 |  |  | 2 |
Roofing materials |  | 1 |  |  | 2 |  |  | 2 |
Other |  | 4 |  |  | 6 |  |  | 4 |
|  | 100 | % |  | 100 | % |  | 100 | %
Schedule of net sales and operating results by segment | Information about us by segment is as follows, for the years ended December 31, in thousands:
|  | Net Sales |  | Operating Profit (b)
|  |  | 2017 |  |  | 2016 |  |  | 2015 |  |  | 2017 |  |  | 2016 |  |  | 2015
Our operations by segment were (a): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Installation (exclusive of significant legal settlement, shown separately below) |  | $ | 1,281,296 |  | $ | 1,150,168 |  | $ | 1,057,553 |  | $ | 139,316 |  | $ | 97,140 |  | $ | 55,232
Significant legal settlement (Installation segment) (c) |  |  | — |  |  | — |  |  | — |  |  | (30,000) |  |  | — |  |  | —
Distribution |  |  | 719,759 |  |  | 676,672 |  |  | 646,441 |  |  | 68,733 |  |  | 59,654 |  |  | 55,700
Intercompany eliminations and other adjustments |  |  | (94,789) |  |  | (83,990) |  |  | (87,414) |  |  | (16,463) |  |  | (14,388) |  |  | (4,796)
Total |  | $ | 1,906,266 |  | $ | 1,742,850 |  | $ | 1,616,580 |  |  | 161,586 |  |  | 142,406 |  |  | 106,136
General corporate expense, net (d) |  |  |  |  |  |  |  |  |  |  |  | (24,722) |  |  | (20,802) |  |  | (22,605)
Operating profit, as reported |  |  |  |  |  |  |  |  |  |  |  | 136,864 |  |  | 121,604 |  |  | 83,531
Other expense, net |  |  |  |  |  |  |  |  |  |  |  | (8,824) |  |  | (5,331) |  |  | (9,416)
Income from continuing operations before income taxes |  |  |  |  |  |  |  |  |  |  | $ | 128,040 |  | $ | 116,273 |  | $ | 74,115
|  | Property Additions |  | Depreciation and Amortization |  | Total Assets
|  | 2017 |  | 2016 |  | 2015 |  | 2017 |  | 2016 |  | 2015 |  | 2017 |  | 2016
Our operations by segment were (a): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Installation |  | $ | 21,956 |  | $ | 7,584 |  | $ | 9,802 |  | $ | 12,208 |  | $ | 8,149 |  | $ | 8,371 |  | $ | 1,061,418 |  | $ | 934,499
Distribution |  |  | 5,845 |  |  | 3,348 |  |  | 3,123 |  |  | 3,561 |  |  | 3,604 |  |  | 3,699 |  |  | 599,503 |  |  | 584,421
Corporate |  |  | 1,620 |  |  | 3,433 |  |  | 1,302 |  |  | 684 |  |  | 258 |  |  | 38 |  |  | 88,628 |  |  | 171,199
Total, as reported |  | $ | 29,421 |  | $ | 14,365 |  | $ | 14,227 |  | $ | 16,453 |  | $ | 12,011 |  | $ | 12,108 |  | $ | 1,749,549 |  | $ | 1,690,119
(a) | All of our operations are located in the U.S.
(b) | Segment operating profit for years ended December 31, 2017 and 2016, includes an allocation of general corporate expenses attributable to the operating segments which is based on direct benefit or usage (such as salaries of corporate employees who directly support the segment). Segment operating profit for year ended December 31, 2015, includes an estimate of general corporate expense calculated based on a percentage of sales. For the year ended December 31, 2015, the $7.2 million difference between estimated expense and actual corporate expense, is recorded in intercompany eliminations and other adjustments.
(c) | Significant legal settlement expense of $30 million incurred for the twelve months ended December 31, 2017, related to the settlement agreement with Owens Corning. For more information see Note 11 – Other Commitments and Contingencies.
(d) | General corporate expense, net included expenses not specifically attributable to our segments for functions such as corporate human resources, finance, and legal, including salaries, benefits, and other related costs.

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