Related Party And Affiliate Transactions (Details) (USD $)	1 Months Ended	12 Months Ended
	Mar. 31, 2000	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Affiliates [Member]
Related Party Transaction [Line Items]
Incurred and paid lease payments		$ 1,556,000	$ 1,549,000	$ 1,469,000
Suzhou Huasu Plastics Company, Ltd. [Member]
Related Party Transaction [Line Items]
Loan to affiliates	2,000,000
Ownership interest		59.00%
Percentage added to LIBOR for interest rate	2.00%
Interest received		441,000	934,000	0
Principal payments received		1,192,000	763,000	0
Previously [Member] | Suzhou Huasu Plastics Company, Ltd. [Member]
Related Party Transaction [Line Items]
Loan to affiliates	5,150,000
Notes Receivable From Affiliate [Member] | Prepaid Expenses And Other Current Assets [Member] | Suzhou Huasu Plastics Company, Ltd. [Member]
Related Party Transaction [Line Items]
Due from affiliate, current		1,192,000
Notes Receivable From Affiliate [Member] | Other Assets, Net [Member] | Suzhou Huasu Plastics Company, Ltd. [Member]
Related Party Transaction [Line Items]
Due from affiliate, noncurrent		$ 2,383,000