Recent Accounting Standard Updates - Additional Information (Detail) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Apr. 30, 2017 |
Apr. 30, 2016 |
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| Significant Accounting Policies [Line Items] | ||
| Excess tax benefit due to early adoption | $ 269 | $ 254 |
| ASU 2016-09 [Member] | ||
| Significant Accounting Policies [Line Items] | ||
| Excess tax benefit due to early adoption | $ 1,800 | |
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- Definition Significant Accounting Policies [Line Items] No definition available.
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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