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Fair Values of Derivative Instruments (Detail) (Derivatives designated as hedging instruments, USD $) In Thousands, unless otherwise specified	Aug. 31, 2014	Feb. 28, 2014
Derivatives, Fair Value [Line Items]
Liability Derivative Fair Value	$ 0	$ 94
Interest Rate Swap Agreements (Long-Term Portion)
Derivatives, Fair Value [Line Items]
Liability Derivative Fair Value	$ 0	$ 94

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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