Charges and Credits (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Charges and Credits [Abstract]
Facility closure costs	$ 122	$ 0	$ 1,349	$ 0
Impairments from disposals	0	1,385	0	1,385
Legal and professional fees related to the exploration of strategic alternatives and securities-related litigation	34	135	34	589
Employee severance	1,317	1,213	1,317	1,213
Indirect tax audit reserve	2,595	0	2,595	0
Executive management transition costs	0	162	0	234
Other Nonrecurring (Income) Expense	$ 4,068	$ 2,895	$ 5,295	$ 3,421

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- Definition

Executive Management Transition Costs

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No definition available.

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- Definition

Indirect Tax Audit Reserve

+ References

No definition available.

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228

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-Section 45
-Paragraph 28
-Subparagraph (b)
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- Definition

The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
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Amount of other expense (income) that is infrequent in occurrence or unusual in nature.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
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- Definition

Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.

+ References

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-Paragraph 28
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
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-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4(b))
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