Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016
Current income tax expense:
United States	$ 2,830	$ 15,279	$ 5,048
Other Nations	26,593	23,826	19,929
States (U.S.)	910	1,163	1,348
Total current income tax expense	30,333	40,268	26,325
Deferred income tax (benefit) expense:
United States	30,267	(8,173)	3,946
Other Nations	(1,462)	(1,329)	(1,387)
States (U.S.)	1,817	221	351
Total deferred income tax (benefit) expense	30,622	(9,281)	2,910
Income Tax Expense (Benefit), Continuing Operations	$ 60,955	$ 30,987	$ 29,235