Segments (Details) (USD $)	3 Months Ended
	May 31, 2014 segment		May 31, 2013		Feb. 28, 2014
Segment Reporting Information [Line Items]
Number of operating segments	2
Operations and assets by segment
Net Sales	$ 216,126,392		$ 183,174,619
Operating Income	27,847,452		24,028,125
General Corporate Expense	7,892,551	[1]	10,471,244	[1]
Interest Expense	4,208,545		4,477,687
Other (Income) Expense, Net	4,753	[2]	(3,804,247)	[2]
Total expenses	12,105,849		11,144,684
Income Before Income Taxes	23,696,518		23,401,816
Assets	983,539,494		982,196,000		953,253,035
Electrical and Industrial Products [Member]
Operations and assets by segment
Net Sales	130,521,000		96,466,000
Operating Income	13,811,913	[3]	13,048,000	[3]
Assets	559,341,000		557,135,000
Galvanizing Services [Member]
Operations and assets by segment
Net Sales	85,605,000		86,709,000
Operating Income	21,990,454	[3]	21,499,000	[3]
Assets	383,612,000		378,102,000
Operating Segments [Member]
Operations and assets by segment
Operating Income	35,802,367	[3]	34,546,500	[3]
Corporate [Member]
Operations and assets by segment
Assets	$ 40,586,000		$ 46,959,000

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

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

[3] 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.