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Commitments And Contingencies (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 years | Dec. 31, 2010 | Dec. 31, 2009
Minimum number of years between arbitrations | 5 |  |
Reimbursement of remediation costs sought by PolyOne | $ 1,400 |  |
Rental expense, net of railcar mileage credits | 36,644 | 38,506 | 42,886
PolyOne [Member] |  |  |
Percentage of costs related to environmental issues to be paid by PolyOne | 100.00% |  |
Costs incurred environmental remediation services | $ 3,287 | $ 3,028 |

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