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Summary of Significant Accounting Policies (Details 1)	12 Months Ended
Summary of Significant Accounting Policies (Details 1)	Dec. 31, 2012	Dec. 31, 2011
Major Customer Percent of Sales	10
Dart Container Corporation
Major Customer Percent of Sales	43.0	47.3
Owens Corning
Major Customer Percent of Sales	25.4	23.4
McMoran Exploration
Major Customer Percent of Sales	12.8	2.9

Description of risks that arise due to the volume of business transacted with a particular customer. At a minimum, the description informs financial statement users of the general nature of the risk, but excludes "Information about Major Customers" that may be disclosed elsewhere (for instance, segment disclosures).

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