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Description of Business and Summary of Significant Accounting Policies (Details Textual) $ in Millions |  | 9 Months Ended |
--- | --- | --- | ---
Apr. 03, 2017 | Apr. 30, 2017 USD ($) | Apr. 30, 2016 USD ($) | Jul. 31, 2016 USD ($)
Description Of Business and Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Stockholders' Equity Note, Stock Split | two-for-one |  |  |
Tax benefits realized upon ultimate settlement, Description |  | The second step is to measure the tax benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement. |  |
Available-for-sale Securities, Amortized Cost Basis |  |  | $ 21.1 |
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds |  |  | 21.5 |
Available-for-sale Securities, Gross Realized Gains |  |  | $ 0.4 |
Capitalized software costs |  | $ 55.5 |  | $ 49.4
Accumulated amortization expense |  | $ 29.8 |  | $ 20.9
Number of operating segments |  | 2 |  |
Number of reportable segment |  | 2 |  |

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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563 + Details
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- Definition The total amount of proceeds received for the sale of securities, categorized neither as held-to-maturity nor trading securities, during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563 + Details
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- Definition Description of the stock split arrangement. Also provide the retroactive effect given by a stock split that occurs after the balance date but before the release of financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Stock Split -URI http://asc.fasb.org/extlink&oid=6525746 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 4.C) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770 + Details
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