GOODWILL AND OTHER INTANGIBLE ASSETS (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Trade names
Changes made to indefinite-lived intangible assets by reporting segment
Balance at the beginning of the period	$ 9,065
Foreign currency translation adjustment	50
Balance at the end of the period	9,115
Chlorovinyls | Trade names
Changes made to indefinite-lived intangible assets by reporting segment
Balance at the beginning of the period	364
Foreign currency translation adjustment	8
Balance at the end of the period	372
Building Products
Changes made to indefinite-lived intangible assets by reporting segment
Foreign currency translation adjustment	(1,684)	(1,684)
Building Products | Trade names
Changes made to indefinite-lived intangible assets by reporting segment
Balance at the beginning of the period	8,701
Foreign currency translation adjustment	42
Balance at the end of the period	$ 8,743