GOODWILL AND INTANGIBLE ASSETS (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2011	Dec. 29, 2012
Webforge
Non-amortized intangible assets
Carrying value of trade names	$ 16,659	$ 17,411
Newmark
Non-amortized intangible assets
Carrying value of trade names	11,111	11,111
Ingal EPS/Ingal Civil Products
Non-amortized intangible assets
Carrying value of trade names	8,792	9,189
Donhad
Non-amortized intangible assets
Carrying value of trade names	6,633	6,932
Pure Metal Galvanizing
Non-amortized intangible assets
Carrying value of trade names		2,022
PiRod
Non-amortized intangible assets
Carrying value of trade names	1,750	1,750
Write down of trade name	3,779
Industrial Galvanizers
Non-amortized intangible assets
Carrying value of trade names	3,856	4,030
Other
Non-amortized intangible assets
Carrying value of trade names	7,224	7,247
Trade names
Non-amortized intangible assets
Carrying value of trade names	$ 56,025	$ 59,692