CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Oct. 28, 2017	Oct. 29, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 28,776	$ 51,050
Foreign currency translation losses, net of tax	(94)	(26)
Comprehensive income	$ 28,682	$ 51,024