Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2018	Oct. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 114,083	$ 77,560
Other comprehensive income:
Foreign currency translation adjustments	(7,718)	(1,480)
Comprehensive income, net of tax:
Comprehensive income	106,365	76,080
Comprehensive income attributable to noncontrolling interest	0	45
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 106,365	$ 76,035