GOODWILL AND INTANGIBLE ASSETS (Details 3) (USD $)	6 Months Ended	3 Months Ended	6 Months Ended			6 Months Ended
	Jun. 30, 2012	Sep. 24, 2011 Webforge	Jun. 30, 2012 Engineered Infrastructure Products segment:	Jun. 30, 2012 Utility Support Structures segment	Dec. 31, 2011 Utility Support Structures segment	Jun. 30, 2012 Coatings segment	Jun. 30, 2012 Irrigation segment	Jun. 30, 2012 Other
Carrying amount of goodwill
Balance at the beginning of the period	$ 314,662,000		$ 151,558,000	$ 77,141,000	$ 77,141,000	$ 64,820,000	$ 2,576,000	$ 18,567,000
Foreign currency translation	(1,885,000)		(618,000)			(932,000)	(71,000)	(264,000)
Balance at the end of the period	312,777,000		150,940,000	77,141,000	77,141,000	63,888,000	2,505,000	18,303,000
Write-down of tradenames		64,500,000
Excess of fair value over carrying value		$ 3,100,000