Income Taxes - Schedule of Unrecognized Tax Benefit Rollforward (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016
Unrecognized Tax Benefits:
Beginning balance	$ 18,362	$ 15,294	$ 21,133
Additions based on tax positions related to the current year	2,467	2,500	3,093
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	1,586	1,124	1,290
Reductions for tax positions of prior years	(23)	(62)	(9,369)
Lapse of statute of limitations	(489)	(663)	(344)
Settlements with tax authorities	(1,277)	(118)	(456)
Cumulative Translation Adjustments and other		287
Ending balance	20,430	$ 18,362	15,294
Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation	$ (196)		$ (53)