CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jan. 27, 2018	Jan. 25, 2020	Jan. 26, 2019	Jul. 29, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 68,835	$ 57,215	$ 62,907	$ 157,217
Foreign currency translation gains (losses), net of tax	12	(499)	(136)	116
Comprehensive income	$ 68,847	$ 56,716	$ 62,771	$ 157,333