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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2016
Accounting Policies [Abstract] |
Inventories [Table Text Block] | Inventories included the following (work in process is not material):
|  | December 31, 2016 |  | December 31, 2015
|  | (thousands)
Finished goods and work in process |  | $ | 330,026 |  |  | $ | 292,826 |
Logs |  | 63,208 |  |  | 58,299 |
Other raw materials and supplies |  | 40,217 |  |  | 33,732 |
|  | $ | 433,451 |  |  | $ | 384,857 |
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, 2016 |  | December 31, 2015 |  | General Range of Estimated Useful Lives in Years
|  | (thousands) |  |  |  |
Land |  | $ | 38,700 |  |  | $ | 36,876 |  |  |  |  |
Buildings |  | 136,087 |  |  | 106,269 |  |  | 20 |  | - | 40
Improvements |  | 50,655 |  |  | 46,205 |  |  | 10 |  | - | 15
Mobile equipment, information technology, and office furniture |  | 125,486 |  |  | 109,702 |  |  | 3 |  | - | 7
Machinery and equipment |  | 613,060 |  |  | 437,433 |  |  | 7 |  | - | 12
Construction in progress |  | 34,877 |  |  | 34,661 |  |  |  |  |
|  | 998,865 |  |  | 771,146 |  |  |  |  |
Less accumulated depreciation |  | (430,163 | ) |  | (368,480 | ) |  |  |  |
|  | $ | 568,702 |  |  | $ | 402,666 |  |  |  |  |

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