Goodwill and Intangible Assets - Schedule of Goodwill (Details) (USD $)	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 121,383,863	$ 113,463,000
Acquisitions	52,246,000	7,916,000
Foreign Exchange Translation	(1,744,000)	5,000
Goodwill, ending balance	171,886,270	121,383,863
Galvanizing Services [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	78,053,000	69,971,000
Acquisitions	19,923,000	7,916,000
Foreign Exchange Translation	(1,241,000)	166,000
Goodwill, ending balance	96,735,000	78,053,000
Electrical and Industrial Products and Services [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	43,331,000	43,492,000
Acquisitions	32,323,000	0
Foreign Exchange Translation	(503,000)	(161,000)
Goodwill, ending balance	$ 75,151,000	$ 43,331,000