Summarized Financial Information For Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Feb. 28, 2014	Nov. 30, 2013	Aug. 31, 2013	May 31, 2013	Feb. 28, 2013	Nov. 30, 2012	Aug. 31, 2012	May 31, 2012	Feb. 28, 2014	Feb. 28, 2013
Discontinued Operations [Line Items]
Cost of goods sold									$ 15,489	$ 10,717
Gross profit (loss)	(1,706)	226	224	178	408	295	164	441	(1,078)	1,308
Operating expenses
Selling and delivery									1,686	2,155
General and administrative									3,061	2,403
Total operating expenses									4,747	4,558
Operating profit from discontinued operations									(5,825)	(3,250)
Interest expense									(714)	(697)
Other, net									593	32
Nonoperating Income (Expense)									(121)	(665)
Income tax expense									(486)	(1,433)
Income from discontinued operations									2,779	2,490
Discontinued Operations
Discontinued Operations [Line Items]
Net sales									23,637	37,078
Cost of goods sold									18,319	25,472
Gross profit (loss)									5,318	11,606
Operating expenses
Selling and delivery									1,609	3,195
General and administrative									3,638	4,972
Total operating expenses									5,247	8,167
Operating profit from discontinued operations									71	3,439
Other income (expense)									190	349
Interest expense									(6)	(16)
Other, net									184	333
Gain on sale of assets									3,956
Nonoperating Income (Expense)									4,140	333
Income from discontinued operations before income taxes									4,211	3,772
Income tax expense									1,432	1,282
Income from discontinued operations									$ 2,779	$ 2,490