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Summary of Changes in Fair Value of Pension Plan Assets (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jul. 31, 2017
Jul. 31, 2016
Fair value of plan assets at beginning of year $ 25,473 $ 19,350
Actual return on plan assets (5,005) 5,556
Employee contributions 104 120
Employer contributions (withdrawals), net (342) 539
Settlements (279) (55)
Benefits and administrative expenses paid (157) (269)
Currency translation 1,410 232
Fair value of plan assets at end of year $ 21,204 $ 25,473