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Property and Equipment, Net
 12 Months Ended
Jul. 31, 2019
Property, Plant and Equipment [Abstract]  
Property and Equipment, Net
NOTE 3 — Property and Equipment, Net

Property and equipment, net consisted of the following:
 
 
July 31,
(In thousands)
 
2019
 
2018
Transportation and other equipment
 
$
236,282

 
$
190,900

Office furniture and equipment
 
63,200

 
58,477

Software
 
39,434

 
30,680

Land
 
939,817

 
762,524

Buildings and leasehold improvements
 
686,615

 
610,964

 
 
1,965,348

 
1,653,545

Less: Accumulated depreciation and amortization
 
(537,622
)
 
(490,120
)
Property and equipment, net
 
$
1,427,726

 
$
1,163,425



Depreciation expense on property and equipment was $66.8 million, $58.8 million and $39.6 million for the years ended July 31, 2019, 2018 and 2017, respectively. Amortization expense of software was $7.6 million, $5.7 million and $10.6 million for the years ended July 31, 2019, 2018 and 2017, respectively. During the year ended July 31, 2018, the Company retired fully amortized capitalized software of $15.5 million, which were no longer being utilized. Additionally, during the year ended July 31, 2017, the Company recognized a $19.4 million charge primarily related to fully impairing costs previously capitalized in connection with the development of business operating software.