Segments (Details) (USD $)	3 Months Ended
	May 31, 2013 segment		May 31, 2012
Segment Reporting Information [Line Items]
Number of operating segments	2
Operations and assets by segment
Net Sales	$ 183,174,619		$ 127,142,864
Operating Income	38,747,000	[1]	29,471,000	[1]
General Corporate Expense	10,471,000	[2]	6,774,000	[2]
Interest Expense	4,477,687		3,340,166
Other (Income) Expense, Net	396,000	[3]	(5,733,000)	[3]
Total expenses	15,345,000		4,381,000
Income Before Income Taxes	23,402,000		25,090,000
Total Assets	982,196,000		607,247,000
Electrical and Industrial Products [Member]
Operations and assets by segment
Net Sales	96,466,000		44,682,000
Operating Income	13,048,000	[1]	6,838,000	[1]
Total Assets	556,702,000		143,205,000
Galvanizing Services [Member]
Operations and assets by segment
Net Sales	86,709,000		82,461,000
Operating Income	25,699,000	[1]	22,633,000	[1]
Total Assets	378,102,000		313,813,000
Corporate [Member]
Operations and assets by segment
Total Assets	$ 47,392,000		$ 150,229,000

[1] Segment operating income consists of net sales, less cost of sales, specifically identifiable selling, general and administrative expenses, and other income and expense items that are specifically identifiable to a segment.

[2] General Corporate Expense consists of selling, general and administrative expenses that are not specifically identifiable to a segment.

[3] Other (income) expense, net includes gains or losses on sale of property, plant and equipment and other (income) expenses not specifically identifiable to a segment.