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Description of Business and Summary of Significant Accounting Policies (Details Textual) $ in Millions |  | 6 Months Ended |
--- | --- | --- | ---
Mar. 23, 2017 | Jan. 31, 2018 USD ($) | Jul. 31, 2017 USD ($)
Description Of Business and Summary Of Significant Accounting Policies [Line Items] |  |  |
Stockholders' Equity Note, Stock Split | two-for-one |  |
Noncontrolling Interest, Ownership Percentage by Parent |  | 59.50% |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  | 40.50% |
Abnormal Costs |  | $ 62.4 |
Tax benefits realized upon ultimate settlement, Description |  | The second step is to measure the tax position as the largest amount that is more than 50% likely to be realized upon ultimate settlement. |
Capitalized software costs |  | $ 28.1 | $ 38.5
Accumulated amortization expense |  | 14.9 | $ 25.7
Capitalized Computer Software, Period Increase (Decrease) |  | $ 13.9 |
Number of operating segments |  | 2 |
Number of reportable segment |  | 2 |

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- Definition For each balance sheet presented, the amount of accumulated amortization for capitalized computer software costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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