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Deferred Costs (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Apr. 30, 2018 | Apr. 30, 2017 | Jan. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |  |  |
Deferred sales commissions | $ 200,000 |  | $ 204,000
Amortization of deferred costs | $ 16,360 | $ 13,637 |

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- Definition The amount of expense recognized in the current period for the periodic realization of capitalized fees that were paid to salespeople, distributors, brokers, and agents at the time of the conclusion of the sale. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 2: 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) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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Balance Type: | debit
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- References No definition available. + Details
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- Definition Deferred professional service costs noncurrent. + References No definition available. + Details
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Balance Type: | debit
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