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Property and Equipment
 6 Months Ended
Jul. 28, 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)
 
July 28, 2018
 
January 27, 2018
 Land
—
 
$
3,470

 
$
3,470

 Buildings
10-35
 
12,436

 
12,315

 Leasehold improvements
1-10
 
15,334

 
14,202

 Vehicles
1-5
 
555,982

 
536,379

 Computer hardware and software
1-7
 
128,718

 
117,058

 Office furniture and equipment
1-10
 
12,407

 
11,686

 Equipment and machinery
1-10
 
285,077

 
273,712

 Total
 
 
1,013,424

 
968,822

 Less: accumulated depreciation
 
 
(589,744
)
 
(554,054
)
 Property and equipment, net
 
 
$
423,680

 
$
414,768



Depreciation expense was $39.0 million and $34.0 million for the three months ended July 28, 2018 and July 29, 2017, respectively, and $76.7 million and $65.1 million for the six months ended July 28, 2018 and July 29, 2017, respectively.