Concentrations of Risk	12 Months Ended
Concentrations of Risk	Dec. 31, 2014
Risks and Uncertainties [Abstract]
Concentration of Risk	Concentrations of Risk Our Paper segment has had a long-standing commercial and contractual relationship with OfficeMax Incorporated (OfficeMax), and OfficeMax is our largest customer in the paper business. OfficeMax was acquired by Office Depot, Inc. late in 2013. Office Depot has since agreed to be acquired by Staples, Inc. on February 4, 2015. The pending acquisition by Staples is subject to the satisfaction of certain conditions. This relationship exposes us to a significant concentration of business and financial risk. Our sales to Office Depot (including OfficeMax) represented 9% and 2% of our total company sales, for 2014 and for the period of October 25, 2013, through December 31, 2014, respectively, and 44% and 38% of our Paper segment sales revenue for those periods, respectively. At December 31, 2014 and 2013, we had $52.6 million and $39.2 million of accounts receivable due from Office Depot (including OfficeMax), which represents 8% and 6% of our total company receivables, respectively. Our agreement with OfficeMax will continue to remain in effect after a merger or acquisition as to the office paper requirements of the legacy OfficeMax business. However, we cannot predict how any merger or acquisition will affect the financial condition of the ultimate entity, the paper requirements of the legacy Office Max business, the purchasing decisions of the ultimate entity or the effects on pricing or competition for office papers. In 2014, sales to Office Depot (including Office Max) represented 44% of our Paper segment sales. If these sales are reduced, whether as a result of the pending integration of Office Max into Office Depot, the future acquisition of Office Depot by Staples or otherwise, we would need to find new customers, which could harm our profitability if our prices are lower or costs are higher. Any significant deterioration in the financial condition of the ultimate entity affecting its ability to pay or any other change that results in its willingness to purchase our products will harm our business and results of operations. Labor At December 31, 2014, we had approximately 14,000 employees and approximately 50% of these employees worked pursuant to collective bargaining agreements. Approximately 75% of our hourly employees are represented by unions. The majority of our unionized employees are represented by the United Steel Workers (USW), the International Brotherhood of Teamsters (IBT), the International Association of Machinists (IAM), and the Association of Western Pulp and Paper Workers (AWPPW). Approximately 16% of our employees work pursuant to collective bargaining agreements that will expire within the next twelve months.

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

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