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Business Segment Information (Termination Benefits and Facility Closings) - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2013
Segment Reporting [Abstract]
Compensation termination benefits description	Termination benefits are primarily considered part of an ongoing benefit arrangement, accounted for in accordance with ASC Topic 712, "Compensation - Nonretirement Postemployment Benefits," and are recorded when payment of the benefits is probable and can be reasonably estimated.
Severance charges	$ 5,418us-gaap_SeveranceCosts1	$ 6,890us-gaap_SeveranceCosts1	$ 6,975us-gaap_SeveranceCosts1
Severance accrual	$ 4,303am_SeveranceLiability	$ 3,974am_SeveranceLiability

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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