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