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Acquisitions (Details) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2018 USD ($) business | Jul. 31, 2017 USD ($)
Business Acquisition [Line Items] |  |
Goodwill, purchase accounting adjustments | $ (377) |
Number of Businesses Acquired | business | 2 |
Acquisitions 2018 [Domain] |  |
Business Acquisition [Line Items] |  |
Business Acquisition, Percentage of Voting Interests Acquired | 100.00% | 100.00%
Business Combination, Consideration Transferred | $ 8,900 |
Goodwill, purchase accounting adjustments | 1,300 |
Indefinite-lived Intangible Assets Acquired | $ 1,200 |
Number of Businesses Acquired | business | 1 |
Acquisitions 2017 [Domain] |  |
Business Acquisition [Line Items] |  |
Business Combination, Consideration Transferred |  | $ 160,700

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- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e961-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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