Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2016	Nov. 30, 2015
Income Statement [Abstract]
Net Sales	$ 227,459	$ 242,447	$ 665,171	$ 685,581
Costs and Expenses
Cost of Sales	173,593	179,999	506,091	510,324
Gross Profit	53,866	62,448	159,080	175,257
Selling, General and Administrative	25,082	26,040	80,898	79,545
Operating Income (Loss)	28,784	36,408	78,182	95,712
Interest Expense	3,654	3,743	11,159	11,612
Gain (Loss) on Disposition of Property Plant Equipment	57	16	(26)	465
Other Expense (Income) - net	(759)	(27)	(949)	828
Income Before Income Taxes	25,946	32,708	67,946	83,737
Income Tax Expense	7,695	9,161	18,609	23,023
Net Income	$ 18,251	$ 23,547	$ 49,337	$ 60,714
Earnings Per Common Share
Basic Earnings Per Share (usd per share)	$ 0.70	$ 0.91	$ 1.90	$ 2.35
Diluted Earnings Per Share (usd per share)	$ 0.70	$ 0.91	$ 1.89	$ 2.34