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Contingencies Subsequent Event (Details) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2013 | Dec. 31, 2012 Anti-dumping investigation [Member] t | Dec. 31, 2012 High purity pulps [Member] Anti-dumping investigation [Member] t
Anti-dumping Investigation [Line Items] |  |  |
Loss Contingency, Period of Occurrence |  | February 6, 2013 |
Subsequent Event, Description | sell all of the assets of its Wood Products business | China's Ministry of Commerce (MOFCOM) notified the Company and a number of other parties that it had commenced an anti-dumping investigation into imports of dissolving, cotton and bamboo pulp into China from the U.S., Canada and Brazil. The notice published by MOFCOM indicates that the investigation was initiated based on a petition filed by a number of primarily commodity viscose pulp manufacturers in China. Nonetheless, as currently scoped by MOFCOM, the investigation includes all dissolving pulp, including the Company's high alpha (high purity) cellulose specialties pulps. |
Period under investigation for dumping |  | calendar year 2012 |
Period under investigation for determining potential injury |  | January 1, 2010 until December 31, 2012 |
Tons of pulp shipped to China |  | 124,000 | 114,500
Expected duration of investigation |  | 12 to 18 months |
Expected time frame for preliminary determination |  | 6 to 9 months after initiation |
Expected time frame for final determination |  | Between 12 and 18 months from initiation |
Period for dumping duties |  | 5 years |
Impact and conclusion disclosure |  | The Company will cooperate with this investigation. While no assurances can be given, it is not expected that this matter will have a material adverse effect on the business or financial condition of the Company. |

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