Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2018	Nov. 30, 2017	Nov. 30, 2018	Nov. 30, 2017
Income Statement [Abstract]
Net sales	$ 239,516	$ 208,158	$ 724,539	$ 609,770
Costs and Expenses
Cost of sales	189,761	177,041	569,175	487,471
Gross margin	49,755	31,117	155,364	122,299
Selling, general and administrative	26,986	29,563	91,794	83,335
Operating income	22,769	1,554	63,570	38,964
Interest expense	3,723	3,507	11,541	10,267
Other (income) expense, net	309	15	(839)	90
Income (loss) before income taxes	18,737	(1,968)	52,868	28,607
Income tax expense (benefit)	3,342	(1,802)	10,511	6,925
Net income (loss)	$ 15,395	$ (166)	$ 42,357	$ 21,682
Earnings Per Common Share
Basic Earnings Per Share (usd per share)	$ 0.59	$ (0.01)	$ 1.63	$ 0.83
Diluted Earnings Per Share (usd per share)	0.59	(0.01)	1.62	0.83
Common Stock, Dividends, Per Share, Declared	$ 0.17	$ 0.17	$ 0.51	$ 0.51