Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2020	Nov. 30, 2019
Income Statement [Abstract]
Sales	$ 226,623	$ 291,139	$ 643,287	$ 816,452
Costs and Expenses
Cost of sales	171,948	223,808	500,311	630,328
Gross margin	54,675	67,331	142,976	186,124
Selling, general and administrative	25,228	33,903	79,867	99,515
Restructuring and impairment charges	1,576	0	20,269	0
Operating income	27,871	33,428	42,840	86,609
Interest expense	2,272	3,301	7,376	10,433
Other (income) expense, net	(724)	(743)	823	367
Income before income taxes	26,323	30,870	34,641	75,809
Income tax expense	6,620	8,835	11,187	16,932
Net income	$ 19,703	$ 22,035	$ 23,454	$ 58,877
Earnings Per Common Share
Basic earnings per share (usd per share)	$ 0.76	$ 0.84	$ 0.90	$ 2.25
Diluted earnings per share (usd per share)	0.76	0.84	0.90	2.24
Cash dividends declared per common share (usd per share)	$ 0.17	$ 0.17	$ 0.51	$ 0.51