Other Expense, Net (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Other Expense, Net [Line Items]
DeRidder restructuring	$ 4,270	[1]	$ 0		$ 5,690	[1]	$ 0
Integration-related and other costs	3,040	[2]	0		11,999	[2]	0
Class action lawsuit settlement	0		0		17,600	[3]	0
Pension curtailment charges	0		3,132	[4]	0		10,908	[4]
Acquisition-related costs	0		1,479	[5]	0		1,479	[5]
Asset disposals and write-offs	2,854		3,486		6,912		9,508
Other	2,146		(376)		1,803		615
Total	12,310		7,721		44,004		22,510
Corporate and Other
Other Expense, Net [Line Items]
Class action lawsuit settlement					$ 17,600	[3]

[1] Costs relate primarily to the conversion of the Number 3 newsprint machine at our DeRidder, Louisiana, mill to produce lightweight linerboard and corrugating medium, and our exit from the newsprint business in September 2014.

[2] The three and nine months ended September 30, 2014, include Boise acquisition integration-related and other costs.

[3] The nine months ended September 30, 2014, includes $17.6 million of costs for the settlement of the Kleen Products LLC v Packaging Corp. of America et al class action lawsuit. See Note 18, Commitments, Guarantees, Indemnifications and Legal Proceedings, for more information.

[4] The three and nine months ended September 30, 2013, include $3.1 million and $10.9 million, respectively, of non-cash pension curtailment charges related to pension plan changes in which certain hourly corrugated plant and containerboard mill employees will transition from a defined benefit pension plan to a defined contribution (401k) plan.

[5] The three and nine months ended September 30, 2013, both include $1.5 million of acquisition-related costs, primarily for professional fees related to transaction-advisory services and expenses related to financing the acquisition of Boise.