Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2017	Feb. 29, 2016	Feb. 28, 2015
Income Statement [Abstract]
Net sales	$ 356,888	$ 385,946	$ 380,379
Cost of goods sold	252,938	269,636	265,308
Gross profit margin	103,950	116,310	115,071
Selling, general and administrative	63,147	65,743	60,661
(Gain) loss from disposal of assets	278	(479)	(54)
Income from operations	40,525	51,046	54,464
Other income (expense)
Interest expense	(613)		(8)
Other, net	121	(5)	(1)
Total other expense	(492)	(5)	(9)
Earnings from continuing operations before income taxes	40,033	51,041	54,455
Provision for income taxes	13,616	18,783	19,985
Earnings from continuing operations	26,417	32,258	34,470
Income (loss) from discontinued operations, net of tax	2,481	3,478	(79,003)
Loss on sale of discontinued operations, net of tax	(27,118)
Earnings (loss) from discontinued operations, net of tax	(24,637)	3,478	(79,003)
Net earnings (loss)	$ 1,780	$ 35,736	$ (44,533)
Weighted average common shares outstanding
Basic	25,734,667	25,688,273	25,864,352
Diluted	25,749,185	25,722,367	25,864,352
Earnings (loss) per share - basic
Continuing operations	$ 1.03	$ 1.25	$ 1.33
Discontinued operations	(0.96)	0.14	(3.05)
Net earnings (loss)	0.07	1.39	(1.72)
Earnings (loss) per share - diluted
Continuing operations	1.03	1.25	1.33
Discontinued operations	(0.96)	0.14	(3.05)
Net earnings (loss)	0.07	1.39	(1.72)
Cash dividends per share	$ 2.20	$ 0.70	$ 0.70