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Property and Equipment | 9 Months Ended
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Oct. 27, 2018
Property, Plant and Equipment [Abstract] |
Property and Equipment | Property and Equipment Property and equipment consisted of the following (dollars in thousands):
| Estimated Useful Lives (Years) |  | October 27, 2018 |  | January 27, 2018
Land | — |  | $ | 4,359 |  |  | $ | 3,470 |
Buildings | 10-35 |  | 13,321 |  |  | 12,315 |
Leasehold improvements | 1-10 |  | 16,326 |  |  | 14,202 |
Vehicles | 1-5 |  | 573,751 |  |  | 536,379 |
Computer hardware and software | 1-7 |  | 133,286 |  |  | 117,058 |
Office furniture and equipment | 1-10 |  | 12,604 |  |  | 11,686 |
Equipment and machinery | 1-10 |  | 292,049 |  |  | 273,712 |
Total |  |  | 1,045,696 |  |  | 968,822 |
Less: accumulated depreciation |  |  | (617,391 | ) |  | (554,054 | )
Property and equipment, net |  |  | $ | 428,305 |  |  | $ | 414,768 |
Depreciation expense was $39.8 million and $36.4 million for the three months ended October 27, 2018 and October 28, 2017, respectively, and $116.5 million and $101.5 million for the nine months ended October 27, 2018 and October 28, 2017, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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