Commitments and Contingencies (Details) (USD $)	Mar. 31, 2012 T	Mar. 31, 2012 Seven Hills [Member]	Mar. 31, 2012 Guarantee Type, Other [Member] Other Entities [Member]	Mar. 31, 2012 Other Long Term Liabilities [Member]	Mar. 31, 2012 Other Current Liabilities [Member]	Mar. 31, 2012 Smurfit Stone [Member]	Apr. 09, 2012 Pending or Threatened Litigation [Member]	Oct. 05, 2011 Pending or Threatened Litigation [Member]
Commitments and Contingencies [Line Items]
Estimated cost of complying with current proposed Boiler MACT rules	$ 200,000,000
Number of tons of CO2 equal to or greater than produced by facility subject to EPA rule	25,000
Accrual for Environmental Loss Contingencies	4,700,000			2,600,000	2,100,000
Equity Method Investment, Ownership Percentage		49.00%
Guarantor Obligations, Maximum Exposure, Undiscounted			5,000,000			18,000,000
Unrecorded Contingent Purchase Obligation, Amount		11,000,000
Percent of Ownership Acquired, Contingent Purchase Obligation		52.00%
Condition to Participate in Future Quasi-Appraisal Proceeding, Cash Amount per Share to be Returned if Former Shareholder Voted in Favor of Merger								$ 41.26
Percentage Voted in Favor of Merger								73.00%
Condition to Participate in Future Quasi-Appraisal Proceeding, Cash Amount per Share to be Returned if Former Shareholder Voted Against Merger								$ 6.26
Percentage Voted Against Merger								7.00%
Amount Received from Holders Seeking Quasi-Appraisal							$ 265,000
Shares of Smurfit-Stone Stock Subject to Holders Seeking Quasi-Appraisal							12,200