Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016
Income Statement [Abstract]
Net Sales	$ 810,430	$ 863,538	$ 889,400
Costs and Expenses
Cost of Sales	650,121	658,206	661,282
Gross profit	160,309	205,332	228,118
Selling, General and Administrative	112,061	106,424	107,823
Operating Income (Loss)	48,248	98,908	120,295
Interest Expense	13,860	14,732	15,155
Other Expense (Income) - net	2,724	(1,197)	3,092
Gain (Loss) on Disposition of Property Plant Equipment	(765)	(76)	327
Income before income taxes	30,899	85,297	102,375
Income Tax Expense	(14,270)	24,033	26,831
Net Income	$ 45,169	$ 61,264	$ 75,544
Earnings Per Common Share
Basic Earnings Per Share (usd per share)	$ 1.74	$ 2.36	$ 2.93
Diluted Earnings Per Share (usd per share)	$ 1.73	$ 2.35	$ 2.91
Weighted average number common shares (shares)	25,970,000	25,965,000	25,800,000
Weighted average number common shares and potentially dilutive common shares (shares)	26,036,000	26,097,000	25,937,000
Common Stock, Dividends, Per Share, Declared	$ 0.68	$ 0.64	$ 0.60