Nature of Business and Basis of Presentation - Additional Information (Detail) - Irish Operations [Member] - USD ($) $ in Millions |
Oct. 31, 2017 |
Jul. 31, 2017 |
Jul. 31, 2016 |
|---|---|---|---|
| Nature Of Business And Basis Of Presentation [Line Items] | |||
| Undistributed earnings of foreign subsidiaries | $ 58.6 | ||
| Deferred tax liability related to the foreign income | $ 16.3 | $ 14.7 |
| X | ||||||||||
- Definition Nature of business and basis of presentation. No definition available.
|
| X | ||||||||||
- Definition Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiaries and other recognized entities not within the country of domicile of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|