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Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment information |  |  |  |  |  |  |  |  |  |  |
Percentage of net sales |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00%
Net sales | $ 501,401 | $ 489,044 | $ 474,458 | $ 441,363 | $ 444,135 | $ 453,102 | $ 431,589 | $ 414,024 | $ 1,906,266 | $ 1,742,850 | $ 1,616,580
Operating profit | 49,970 | $ 49,562 | $ 40,796 | $ (3,463) | 35,944 | $ 39,101 | $ 26,790 | $ 19,767 | 136,864 | 121,604 | 83,531
Significant legal settlement |  |  |  |  |  |  |  |  | (30,000) |  |
Other expense, net |  |  |  |  |  |  |  |  | (8,824) | (5,331) | (9,416)
Income from continuing operations before income taxes |  |  |  |  |  |  |  |  | 128,040 | 116,273 | 74,115
Property Additions |  |  |  |  |  |  |  |  | 29,421 | 14,365 | 14,227
Depreciation and Amortization |  |  |  |  |  |  |  |  | 16,453 | 12,011 | $ 12,108
Total Assets | 1,749,549 |  |  |  | 1,690,119 |  |  |  | $ 1,749,549 | $ 1,690,119 |
Insulation |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
Percentage of net sales |  |  |  |  |  |  |  |  | 72.00% | 71.00% | 72.00%
Rain gutters |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
Percentage of net sales |  |  |  |  |  |  |  |  | 7.00% | 7.00% | 7.00%
Accessories |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
Percentage of net sales |  |  |  |  |  |  |  |  | 5.00% | 5.00% | 4.00%
Afterpaint |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
Percentage of net sales |  |  |  |  |  |  |  |  | 4.00% | 3.00% | 4.00%
Fireproofing and firestopping |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
Percentage of net sales |  |  |  |  |  |  |  |  | 3.00% | 2.00% | 2.00%
Garage doors |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
Percentage of net sales |  |  |  |  |  |  |  |  | 2.00% | 2.00% | 3.00%
Fireplaces |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
Percentage of net sales |  |  |  |  |  |  |  |  | 2.00% | 2.00% | 2.00%
Roofing materials |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
Percentage of net sales |  |  |  |  |  |  |  |  | 1.00% | 2.00% | 2.00%
Other |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
Percentage of net sales |  |  |  |  |  |  |  |  | 4.00% | 6.00% | 4.00%
Installation |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
Significant legal settlement |  |  |  |  |  |  |  |  | $ (30,000) |  |
Property Additions |  |  |  |  |  |  |  |  | 21,956 | $ 7,584 | $ 9,802
Depreciation and Amortization |  |  |  |  |  |  |  |  | 12,208 | 8,149 | 8,371
Total Assets | 1,061,418 |  |  |  | 934,499 |  |  |  | 1,061,418 | 934,499 |
Distribution |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
Property Additions |  |  |  |  |  |  |  |  | 5,845 | 3,348 | 3,123
Depreciation and Amortization |  |  |  |  |  |  |  |  | 3,561 | 3,604 | 3,699
Total Assets | 599,503 |  |  |  | 584,421 |  |  |  | 599,503 | 584,421 |
Operating Segment |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
Operating profit |  |  |  |  |  |  |  |  | 161,586 | 142,406 | 106,136
Operating Segment | Installation |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 1,281,296 | 1,150,168 | 1,057,553
Operating profit |  |  |  |  |  |  |  |  | 139,316 | 97,140 | 55,232
Operating Segment | Distribution |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 719,759 | 676,672 | 646,441
Operating profit |  |  |  |  |  |  |  |  | 68,733 | 59,654 | 55,700
Intercompany Eliminations and Other Adjustments |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | (94,789) | (83,990) | (87,414)
Operating profit |  |  |  |  |  |  |  |  | (16,463) | (14,388) | (4,796)
Other Adjustments |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
Operating profit |  |  |  |  |  |  |  |  |  |  | 7,200
Corporate |  |  |  |  |  |  |  |  |  |  |
Segment information |  |  |  |  |  |  |  |  |  |  |
General corporate expense, net |  |  |  |  |  |  |  |  | (24,722) | (20,802) | (22,605)
Property Additions |  |  |  |  |  |  |  |  | 1,620 | 3,433 | 1,302
Depreciation and Amortization |  |  |  |  |  |  |  |  | 684 | 258 | $ 38
Total Assets | $ 88,628 |  |  |  | $ 171,199 |  |  |  | $ 88,628 | $ 171,199 |

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