Restructuring (Narrative) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
Jul. 31, 2012
Third Quarter 2010 Initiative
Restructuring Cost and Reserve [Line Items]
Severance costs recorded	$ 0.5
Netcentrex 2010 Initiative
Restructuring Cost and Reserve [Line Items]
Severance costs recorded	0.9
Remaining restructuring costs	1.2
Severance Related \| Third Quarter 2010 Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring costs paid	2.9
Severance Related \| Netcentrex 2010 Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring costs paid	$ 0.6

Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

+ References+ Details

The charge against earnings in the period for known and estimated costs of termination benefits provided to current employees that are involuntarily terminated under a benefit arrangement associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding costs or losses pertaining to an entity newly acquired in a business combination or a discontinued operation as defined by generally accepted accounting principles and costs associated with one-time termination benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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Reference 9: http://www.xbrl.org/2003/role/presentationRef

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+ Details