SEGMENT INFORMATION (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Sales by Product Line
Total net sales	$ 3,222,884	$ 2,818,040	$ 1,990,091
Chlorovinyls
Sales by Product Line
Total net sales	1,318,678	1,224,724	940,639
Chlorovinyls | Electrovinyl products
Sales by Product Line
Total net sales	888,312	839,037	622,786
Chlorovinyls | Compound products
Sales by Product Line
Total net sales	430,366	385,687	317,853
Aromatics
Sales by Product Line
Total net sales	1,020,307	799,676	321,305
Aromatics | Cumene products
Sales by Product Line
Total net sales	603,830	520,493	201,288
Aromatics | Phenol/acetone products
Sales by Product Line
Total net sales	416,477	279,183	120,017
Building Products
Sales by Product Line
Total net sales	883,899	793,639	728,147
Building Products | Window & Door Profiles and Moulding products
Sales by Product Line
Total net sales	331,039	347,998	323,696
Building Products | Outdoor Building products
Sales by Product Line
Total net sales	$ 552,860	$ 445,641	$ 404,451