Unaudited Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2016	Nov. 30, 2015
Income Statement [Abstract]
Net sales	$ 88,660	$ 97,516	$ 270,316	$ 294,740
Cost of goods sold	63,368	67,797	191,292	203,694
Gross profit margin	25,292	29,719	79,024	91,046
Selling, general and administrative	15,833	16,427	47,961	48,596
(Gain) loss from disposal of assets	264	(361)	266	(371)
Income from operations	9,195	13,653	30,797	42,821
Other income (expense)
Interest expense	(172)	(3)	(405)	(9)
Other, net	88	(7)	92	(4)
Total other expense	(84)	(10)	(313)	(13)
Earnings from continuing operations before income taxes	9,111	13,643	30,484	42,808
Provision for income taxes	3,371	5,048	11,277	15,839
Earnings from continuing operations	5,740	8,595	19,207	26,969
Income from discontinued operations, net of tax		2,079	2,481	3,922
Loss on sale of discontinued operations, net of tax			(26,042)
Earnings (loss) from discontinued operations, net of tax		2,079	(23,561)	3,922
Net earnings (loss)	$ 5,740	$ 10,674	$ (4,354)	$ 30,891
Weighted average common shares outstanding
Basic	25,673,824	25,684,026	25,802,658	25,665,069
Diluted	25,683,613	25,728,144	25,818,146	25,692,930
Earnings (loss) per share - basic
Continuing operations	$ 0.22	$ 0.34	$ 0.74	$ 1.05
Discontinued operations		0.08	(0.91)	0.15
Net earnings (loss)	0.22	0.42	(0.17)	1.20
Earnings (loss) per share - diluted
Continuing operations	0.22	0.33	0.74	1.05
Discontinued operations		0.08	(0.91)	0.15
Net earnings (loss)	0.22	0.41	(0.17)	1.20
Cash dividends per share	$ 0.175	$ 0.175	$ 2.025	$ 0.525