v2.4.0.6

Commitments and Contingencies (Details) (USD $)	0 Months Ended	3 Months Ended				1 Months Ended	9 Months Ended	12 Months Ended				12 Months Ended
Commitments and Contingencies (Details) (USD $)	Sep. 15, 2011 Unfavorable Regulatory Action Mexican Tax Authority	Feb. 02, 2013 Proposed Merger Transactions Lawsuit	Feb. 02, 2013 Missouri Stockholder Actions Proposed Merger Transactions Lawsuit	Feb. 02, 2013 Delaware Stockholder Actions Proposed Merger Transactions Lawsuit	Feb. 02, 2013 Delaware Stockholder Actions PolyOne Proposed Merger Transactions Lawsuit	Sep. 30, 2003 Lower Passaic River Unfavorable Regulatory Action Company sqmi	Aug. 04, 2012 Lower Passaic River Unfavorable Regulatory Action	Nov. 03, 2007 Lower Passaic River Unfavorable Regulatory Action Alternative	Feb. 02, 2013 Lower Passaic River Unfavorable Regulatory Action	Jun. 30, 2012 Lower Passaic River Unfavorable Regulatory Action	Nov. 03, 2012 Preferred Early Remedital Alternatives Lower Passaic River Unfavorable Regulatory Action	Oct. 31, 2009 Minimum Lower Passaic River Unfavorable Regulatory Action Company	Nov. 01, 2003 Cooperating Parties Lower Passaic River Unfavorable Regulatory Action Company
Loss Contingencies [Line Items]
Number of companies issued directive (companies)						30
Mile stretch of the Passaic River						17
Number of companies in agreement to assume responsibility for completing remedial investigation/ feasibility study													70
RIFS estimated cost							$ 125,000,000
Number of alternatives for early remedial action (alternatives)								9
Estimated cost of alternatives, minimum								900,000,000			1,900,000,000
Estimated cost of alternatives, maximum								2,300,000,000			3,400,000,000
USEPA removal action accrual										200,000
Number of companies named as third-party defendants												300
Accrued costs for contingent matters									1,300,000
Tax assessment	$ 4,800,000
Number of purported class action lawsuits		5	2	2	1

Number Of Companies In Agreement To Assume Responsibility For Completing Remedial Investigation Feasibility Study

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Total costs accrued as of the balance sheet date for environmental loss contingencies.

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SPARTECH CORP 10-Q