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Property and Equipment (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Jul. 27, 2019 | Jan. 26, 2019
Property, Plant and Equipment [Line Items] |  |
Total | $ 1,117,600 | $ 1,073,379
Less: accumulated depreciation | (695,336) | (648,628)
Property and equipment, net | 422,264 | 424,751
Land |  |
Property, Plant and Equipment [Line Items] |  |
Total | 4,024 | 4,359
Buildings |  |
Property, Plant and Equipment [Line Items] |  |
Total | $ 12,882 | 13,555
Buildings | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Lives (Years) | 10 years |
Buildings | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Lives (Years) | 35 years |
Leasehold improvements |  |
Property, Plant and Equipment [Line Items] |  |
Total | $ 16,979 | 16,185
Leasehold improvements | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Lives (Years) | 1 year |
Leasehold improvements | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Lives (Years) | 10 years |
Vehicles |  |
Property, Plant and Equipment [Line Items] |  |
Total | $ 614,128 | 589,741
Vehicles | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Lives (Years) | 1 year |
Vehicles | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Lives (Years) | 5 years |
Computer hardware and software |  |
Property, Plant and Equipment [Line Items] |  |
Total | $ 147,524 | 140,327
Computer hardware and software | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Lives (Years) | 1 year |
Computer hardware and software | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Lives (Years) | 7 years |
Office furniture and equipment |  |
Property, Plant and Equipment [Line Items] |  |
Total | $ 13,396 | 12,804
Office furniture and equipment | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Lives (Years) | 1 year |
Office furniture and equipment | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Lives (Years) | 10 years |
Equipment and machinery |  |
Property, Plant and Equipment [Line Items] |  |
Total | $ 308,667 | $ 296,408
Equipment and machinery | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Lives (Years) | 1 year |
Equipment and machinery | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Estimated Useful Lives (Years) | 10 years |

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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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