Goodwill and Intangible Assets (Details 2) (USD $) In Thousands	Jun. 25, 2011	Dec. 25, 2010
Trade names
Non-amortized intangible assets
Carrying value of trade names	$ 61,539	$ 59,992
Webforge
Non-amortized intangible assets
Carrying value of trade names	17,190	16,478
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	9,126	8,795
Donhad
Non-amortized intangible assets
Carrying value of trade names	6,884	6,635
PiRod
Non-amortized intangible assets
Carrying value of trade names	4,750	4,750
Industrial Galvanizers
Non-amortized intangible assets
Carrying value of trade names	4,803	4,632
Other.
Non-amortized intangible assets
Carrying value of trade names	$ 7,675	$ 7,591