Leases - Supplemental Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 25, 2020	Jul. 27, 2019	Jul. 25, 2020	Jul. 27, 2019
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities	$ 8,508	$ 8,022	$ 16,472	$ 15,473
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$ 6,516	$ 7,777	$ 17,756	$ 13,291