Property, Plant and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 26, 2020	Jan. 27, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 339,205	$ 314,521
Less: accumulated depreciation and amortization	(214,787)	(196,033)
Property, plant and equipment, net	124,418	118,488
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	12,143	11,314
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	35,801	32,229
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	10,148	9,863
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	196,270	185,045
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	68,748	67,746
Furniture and office equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	5,236	5,364
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 10,859	$ 2,960
Minimum | Buildings
Property, Plant and Equipment [Line Items]
Estimated useful lives	7 years
Minimum | Leasehold improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Minimum | Machinery and equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Minimum | Computer hardware and software
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Minimum | Furniture and office equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Maximum | Buildings
Property, Plant and Equipment [Line Items]
Estimated useful lives	39 years
Maximum | Leasehold improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives	12 years
Maximum | Machinery and equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives	8 years
Maximum | Computer hardware and software
Property, Plant and Equipment [Line Items]
Estimated useful lives	13 years
Maximum | Furniture and office equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives	7 years