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Segment Information - Geographic Distribution and Net Sales by Product (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Net sales and long-lived assets by geographical area |  |  |
Net Sales | $ 1,267,945 | $ 1,136,539 | $ 1,078,809
Long-Lived Assets | 267,330 | 258,257 | 264,346
Wood construction products |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 1,082,877 | 948,768 | 913,202
Concrete construction products |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 184,631 | 187,462 | 165,317
Other |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 437 | 309 | 290
United States |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 1,045,509 | 921,703 | 860,482
Long-Lived Assets | 215,082 | 210,349 | 210,063
Canada |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 52,889 | 47,948 | 46,874
Long-Lived Assets | 3,059 | 1,181 | 4,257
United Kingdom |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 24,290 | 26,376 | 27,194
Long-Lived Assets | 2,073 | 1,683 | 1,417
Germany |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 24,069 | 22,357 | 22,950
Long-Lived Assets | 11,163 | 10,529 | 13,221
France |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 40,672 | 39,969 | 40,182
Long-Lived Assets | 7,095 | 7,010 | 7,891
Poland |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 11,648 | 11,826 | 10,200
Long-Lived Assets | 2,779 | 2,770 | 2,794
Sweden |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 15,241 | 13,792 | 15,461
Long-Lived Assets | 2,986 | 1,762 | 1,154
Denmark |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 11,931 | 10,761 | 11,682
Long-Lived Assets | 2,445 | 2,235 | 1,454
Norway |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 11,138 | 11,238 | 12,324
Long-Lived Assets | 0 | 0 | 0
Switzerland |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 5,246 | 5,600 | 6,939
Long-Lived Assets | 8,172 | 7,781 | 8,067
Australia |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 5,749 | 4,939 | 6,119
Long-Lived Assets | 134 | 110 | 199
Belgium |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 5,311 | 5,605 | 5,547
Long-Lived Assets | 2,268 | 1,913 | 1,961
The Netherlands |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 4,526 | 4,019 | 5,068
Long-Lived Assets | 61 | 93 | 81
New Zealand |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 3,593 | 3,606 | 3,061
Long-Lived Assets | 167 | 166 | 111
Chile |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 3,493 | 3,198 | 3,233
Long-Lived Assets | 49 | 28 | 41
Other countries |  |  |
Net sales and long-lived assets by geographical area |  |  |
Net Sales | 2,640 | 3,602 | 1,493
Long-Lived Assets | $ 9,797 | $ 10,647 | $ 11,635

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