Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016
Income Statement [Abstract]
Net sales	$ 370,171	$ 356,888	$ 385,946
Cost of goods sold	253,257	252,938	269,636
Gross profit margin	116,914	103,950	116,310
Selling, general and administrative	69,451	63,147	65,743
(Gain) loss from disposal of assets	162	278	(479)
Income from operations	47,301	40,525	51,046
Other income (expense)
Interest expense	(777)	(613)
Other, net	385	121	(5)
Total other income (expense)	(392)	(492)	(5)
Earnings from continuing operations before income taxes	46,909	40,033	51,041
Income tax expense	14,151	13,616	18,783
Earnings from continuing operations	32,758	26,417	32,258
Earnings (loss) from discontinued operations, net of tax	147	(24,637)	3,478
Net earnings	$ 32,905	$ 1,780	$ 35,736
Weighted average common shares outstanding
Basic	25,391,998	25,734,667	25,688,273
Diluted	25,417,244	25,749,185	25,722,367
Earnings (loss) per share - basic and diluted
Continuing operations	$ 1.29	$ 1.03	$ 1.25
Discontinued operations	0.01	(0.96)	0.14
Net earnings	1.30	0.07	1.39
Cash dividends per share	$ 0.875	$ 2.20	$ 0.70