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Restructuring, Acquisition and Other Charges (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Apr. 30, 2013 Employee
Accrued Expenses (Textual) [Abstract]
Reduction in workforce as part of restructuring plan	8.00%
Expected number of employees reduced under restructuring plan	55
Restructuring Plan [Member]
Accrued Expenses (Textual) [Abstract]
Restructuring Charges	3.1

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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