Severance and Other Restructuring Costs - Change in Severance Liability (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jan. 31, 2016 |
Jan. 31, 2015 |
Jan. 31, 2014 |
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| Restructuring and Related Activities [Abstract] | |||
| Accrual balance at the beginning of the period | $ 2,021 | ||
| Restructuring charges incurred | 1,061 | $ 3,623 | $ 911 |
| Severance costs paid | (2,903) | ||
| Other charges | (132) | ||
| Accrual balance at the ending of the period | $ 47 | $ 2,021 | |
| X | ||||||||||
- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Net total Increase or Decrease in the accrual for restructuring costs during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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