Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	May 31, 2018	May 31, 2017
Income Statement [Abstract]
Net sales	$ 262,236	$ 205,283
Costs and Expenses
Cost of sales	203,531	157,901
Gross margin	58,705	47,382
Selling, general and administrative	35,009	27,359
Operating income	23,696	20,023
Interest expense	3,838	3,360
Other income, net	(291)	(185)
Income before income taxes	20,149	16,848
Income tax expense	4,431	4,786
Net income	$ 15,718	$ 12,062
Earnings Per Common Share
Basic Earnings Per Share (usd per share)	$ 0.60	$ 0.46
Diluted Earnings Per Share (usd per share)	0.60	0.46
Common Stock, Dividends, Per Share, Declared	$ 0.17	$ 0.17