Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2015	Aug. 31, 2014	Aug. 31, 2015	Aug. 31, 2014
Income Statement [Abstract]
Net Sales	$ 214,246	$ 193,416	$ 443,134	$ 409,542
Costs and Expenses
Cost of Sales	160,741	151,316	330,325	312,053
Gross Profit	53,505	42,100	112,809	97,489
Selling, General and Administrative	27,086	19,144	53,505	46,685
Operating Income (Loss)	26,419	22,956	59,304	50,804
Interest Expense	4,023	4,224	7,869	8,432
Gain (Loss) on Disposition of Property Plant Equipment	25	(3)	449	23
Other Expense (Income) - net	547	17	855	(14)
Income Before Income Taxes	21,874	18,712	51,029	42,409
Income Tax Expense	4,631	4,943	13,862	13,715
Net Income	$ 17,243	$ 13,769	$ 37,167	$ 28,694
Earnings Per Common Share
Basic Earnings Per Share (usd per share)	$ 0.67	$ 0.54	$ 1.44	$ 1.12
Diluted Earnings Per Share (usd per share)	$ 0.67	$ 0.53	$ 1.44	$ 1.11