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Seasonality	3 Months Ended
	Mar. 31, 2012
Seasonality [Abstract]
Seasonality	11. SEASONALITY The Company's operating results have historically varied from quarter to quarter, in part due to seasonal trends in the demand for Trex®. The Company has historically experienced lower net sales during the fourth quarter because holidays and adverse weather conditions in certain regions reduce the level of home improvement and construction activity.

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Seasonality Disclosure [Text Block]

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