Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2013
Income Statement [Abstract]
Net Sales	$ 816,687	$ 751,723	$ 570,594
Costs and Expenses
Cost of Sales	610,991	546,018	406,421
Gross profit	205,696	205,705	164,173
Selling, General and Administrative	98,871	105,591	66,189
Operating Income (Loss)	106,825	100,114	97,984
Interest Expense	16,561	18,407	13,073
Other Expense (Income) - net	2,659	(4,165)	(1,155)
Gain (Loss) on Disposition of Property Plant Equipment	2,525	8,039	8,303
Income before income taxes	90,130	93,911	94,369
Income Tax Expense	25,187	34,314	33,913
Net Income	$ 64,943	$ 59,597	$ 60,456
Earnings Per Common Share
Basic Earnings Per Share (usd per share)	$ 2.53	$ 2.34	$ 2.39
Diluted Earnings Per Share (usd per share)	$ 2.52	$ 2.32	$ 2.37
Weighted average number common shares (shares)	25,675,645	25,514,387	25,320,147
Weighted average number common shares and potentially dilutive common shares (shares)	25,777,945	25,693,468	25,560,594