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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract] |
Schedule of Inventory, Current [Table Text Block] | Inventory Inventories are valued at the lower of cost or net realizable value. Inventory costs include materials, labor and operating overhead. The LIFO (last-in, first-out) method is used for a minor portion of our log inventories with the remaining inventories valued at FIFO (first-in, first-out) or average cost. Included in the inventory balance as of December 31, 2018 is a valuation allowance of $10.9 million. Inventory consists of the following:
| December 31,
Dollar amounts in millions | 2018 |  | 2017
Logs | $ | 56.9 |  |  | $ | 60.3 |
Other raw materials | 24.8 |  |  | 20.8 |
Semi finished inventory | 23.4 |  |  | 24.3 |
Finished products | 167.9 |  |  | 153.7 |
Total | $ | 273.0 |  |  | $ | 259.1 |
Depreciation expense [Table Text Block] | Depreciation expense can be attributed to Cost of sales and Selling and administrative as noted below:
Dollar amounts in millions | Years ended December 31,
2018 |  | 2017 |  | 2016
Cost of sales | $ | 116.8 |  |  | $ | 120.1 |  |  | $ | 109.6 |
Selling and administrative | 3.2 |  |  | 3.2 |  |  | 3.2 |
Total depreciation and amortization | $ | 120.0 |  |  | $ | 123.3 |  |  | $ | 112.8 |
Property, Plant and Equipment [Table Text Block] | Plant, property and equipment, net consists of the following:
Dollar amounts in millions | December 31,
2018 |  | 2017
Property, plant and equipment, at cost: |  |  |
Land, land improvements and logging roads, net of road amortization | $ | 168.6 |  |  | $ | 162.7 |
Buildings | 329.9 |  |  | 347.5 |
Machinery and equipment | 1,949.0 |  |  | 1,977.4 |
Construction in progress | 148.1 |  |  | 98.5 |
| 2,595.6 |  |  | 2,586.1 |
Accumulated depreciation | (1,585.2 | ) |  | (1,660.0 | )
Property, plant and equipment, net | $ | 1,010.4 |  |  | $ | 926.1 |

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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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- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: 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(6)(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 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(6)(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 Reference 4: 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(6)(c)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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