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Derivative Financial Instruments (Details) (Not Designated as Hedging Instrument, USD $) In Thousands, unless otherwise specified	Apr. 30, 2014	Jan. 31, 2014	Apr. 30, 2013
Fair value and presentation of derivatives
Asset Derivatives	$ 772	$ 403	$ 212
Liability Derivatives	10	173	111
Foreign Exchange Contract \| Other Current Assets
Fair value and presentation of derivatives
Asset Derivatives	772	403	212
Foreign Exchange Contract \| Accrued Liabilities
Fair value and presentation of derivatives
Liability Derivatives	$ 10	$ 173	$ 111

Fair value of financial asset or other 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, elected not to be offset against an obligation to return collateral under a master netting arrangement.

+ References+ Details

- Definition

Fair value of 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, elected not to be offset against a right to receive collateral under a master netting arrangement.

+ References+ Details