CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 23, 2016	Jan. 24, 2015	Jan. 23, 2016	Jan. 24, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 15,473	$ 9,432	$ 46,297	$ 30,239
Foreign currency translation losses, net of tax	(316)	(458)	(357)	(726)
Comprehensive income	$ 15,157	$ 8,974	$ 45,940	$ 29,513