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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Accounting Policies [Abstract] |
Inventories [Table Text Block] | Inventories included the following (work in process is not material):
|  | December 31, 2017 |  | December 31, 2016
|  | (thousands)
Finished goods and work in process |  | $ | 377,266 |  |  | $ | 330,026 |
Logs |  | 57,229 |  |  | 63,208 |
Other raw materials and supplies |  | 42,178 |  |  | 40,217 |
|  | $ | 476,673 |  |  | $ | 433,451 |
Property and Equipment [Table Text Block] | Property and equipment consisted of the following asset classes with the following general range of estimated useful lives:
|  | December 31, 2017 |  | December 31, 2016 |  | General Range of Estimated Useful Lives in Years
|  | (thousands) |  |  |  |
Land |  | $ | 38,606 |  |  | $ | 38,700 |  |  |  |  |
Buildings |  | 144,404 |  |  | 136,087 |  |  | 20 | - | 40
Improvements |  | 55,267 |  |  | 50,655 |  |  | 10 | - | 15
Mobile equipment, information technology, and office furniture |  | 138,245 |  |  | 125,486 |  |  | 3 | - | 7
Machinery and equipment |  | 659,708 |  |  | 613,060 |  |  | 7 | - | 12
Construction in progress |  | 23,303 |  |  | 34,877 |  |  |  |  |
|  | 1,059,533 |  |  | 998,865 |  |  |  |  |
Less accumulated depreciation |  | (493,741 | ) |  | (430,163 | ) |  |  |  |
|  | $ | 565,792 |  |  | $ | 568,702 |  |  |  |  |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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