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Segment Information - Geographic Distribution and Net Sales by Product (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales | $ 184,764 | $ 216,139 | $ 216,665 | $ 176,491 | $ 166,630 | $ 209,320 | $ 207,893 | $ 168,305 | $ 794,059 | $ 752,148 | $ 705,322
Long-Lived Assets | 219,086 |  |  |  | 210,775 |  |  |  | 219,086 | 210,775 | $ 212,122
Largest customer | Net sales |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Percentage of net sales attributable to largest customer |  |  |  |  |  |  |  |  |  |  | 10.00%
Wood Construction |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 674,274 | 636,003 | $ 596,837
Concrete Construction |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 119,481 | 115,921 | 108,295
Other |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 304 | 224 | 190
United States |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 639,443 | 572,112 | 531,019
Long-Lived Assets | 171,367 |  |  |  | 158,161 |  |  |  | 171,367 | 158,161 | 152,644
Canada |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 36,122 | 40,996 | 41,626
Long-Lived Assets | 4,275 |  |  |  | 5,195 |  |  |  | 4,275 | 5,195 | 5,763
Denmark |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 14,987 | 15,121 | 14,993
Long-Lived Assets | 1,381 |  |  |  | 1,518 |  |  |  | 1,381 | 1,518 | 1,907
United Kingdom |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 22,924 | 24,893 | 21,852
Long-Lived Assets | 1,357 |  |  |  | 1,377 |  |  |  | 1,357 | 1,377 | 1,249
France |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 31,147 | 37,312 | 36,708
Long-Lived Assets | 8,621 |  |  |  | 8,145 |  |  |  | 8,621 | 8,145 | 9,302
Germany |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 19,974 | 27,202 | 26,058
Long-Lived Assets | 13,358 |  |  |  | 15,379 |  |  |  | 13,358 | 15,379 | 17,446
Switzerland |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 5,538 | 4,960 | 5,977
Long-Lived Assets | 9,071 |  |  |  | 9,506 |  |  |  | 9,071 | 9,506 | 11,649
Poland |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 6,417 | 7,491 | 5,982
Long-Lived Assets | 893 |  |  |  | 1,071 |  |  |  | 893 | 1,071 | 692
The Netherlands |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 4,773 | 4,539 | 4,306
Long-Lived Assets | 15 |  |  |  | 30 |  |  |  | 15 | 30 | 63
Portugal |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 1,580 | 806 | 804
Long-Lived Assets | 332 |  |  |  | 472 |  |  |  | 332 | 472 | 688
China/Hong Kong |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 4,097 | 9,646 | 9,802
Long-Lived Assets | 7,510 |  |  |  | 8,966 |  |  |  | 7,510 | 8,966 | 9,499
Australia |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 3,121 | 3,245 | 3,289
Long-Lived Assets | 274 |  |  |  | 267 |  |  |  | 274 | 267 | 356
New Zealand |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 2,154 | 2,237 | 1,701
Long-Lived Assets | 142 |  |  |  | 82 |  |  |  | 142 | 82 | 125
Other countries |  |  |  |  |  |  |  |  |  |  |
Net sales and long-lived assets by geographical area |  |  |  |  |  |  |  |  |  |  |
Net Sales |  |  |  |  |  |  |  |  | 1,782 | 1,588 | 1,205
Long-Lived Assets | $ 490 |  |  |  | $ 606 |  |  |  | $ 490 | $ 606 | $ 739

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