Goodwill and Intangible Assets - Schedule of Goodwill (Details) (USD $)	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 171,886,270	$ 121,383,863
Acquisitions	109,636,000	52,246,000
Foreign Exchange Translation	(2,966,000)	(1,744,000)
Goodwill, ending balance	278,556,040	171,886,270
Galvanizing Services [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	96,735,000	78,053,000
Acquisitions	0	19,923,000
Foreign Exchange Translation	(2,004,000)	(1,241,000)
Goodwill, ending balance	94,731,000	96,735,000
Electrical and Industrial Products and Services [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	75,151,000	43,331,000
Acquisitions	109,636,000	32,323,000
Foreign Exchange Translation	(962,000)	(503,000)
Goodwill, ending balance	$ 183,825,000	$ 75,151,000