Schedule Two, Reserve for Receivable Allowances and Inventory Reserves (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Feb. 28, 2011
Allowance for Doubtful Accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 696	$ 420	$ 716
Charged to Costs and Expense	1,920	1,717	1,328
Additions Charged to Other Accounts
Reclassifications and Acquisitions
Deductions from Reserve	(2,127)	(1,441)	(1,624)
Balance at End of Year	489	696	420
Inventory Valuation Reserve
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	1,342	1,656	2,527
Charged to Costs and Expense	3,099	4,710	4,391
Additions Charged to Other Accounts
Reclassifications and Acquisitions
Deductions from Reserve	(3,269)	(5,024)	(5,262)
Balance at End of Year	$ 1,172	$ 1,342	$ 1,656