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Summary of Significant Accounting Policies - Product Warranty Roll-forward (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 29, 2012
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance, beginning balance	$ 2,073	$ 1,670	$ 2,486
Warranty costs incurred	(2,246)	(2,026)	(2,394)
Additions charged to income	1,511	2,429	1,578
Balance, ending balance	$ 1,338	$ 2,073	$ 1,670

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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