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Property and Equipment, Net
 12 Months Ended
Jul. 31, 2017
Property, Plant and Equipment [Abstract]  
Property and Equipment, Net
4 — Property and Equipment, Net

Property and equipment, net consisted of the following:
 
 
July 31,
(In thousands)
 
2017
 
2016
Transportation and other equipment
 
$
120,420

 
$
85,083

Office furniture and equipment
 
51,778

 
51,473

Software
 
38,501

 
49,426

Land
 
629,826

 
556,780

Buildings and leasehold improvements
 
555,525

 
489,566

 
 
1,396,050

 
1,232,328

Less: Accumulated depreciation and amortization
 
(451,994
)
 
(415,537
)
Property and equipment, net
 
$
944,056

 
$
816,791



Depreciation expense on property and equipment was $39.6 million, $34.2 million and $34.9 million for the years ended July 31, 2017, 2016 and 2015, respectively. Amortization expense of software was $10.6 million, $8.5 million and $5.0 million for the years ended July 31, 2017, 2016 and 2015, respectively. During the year ended July 31, 2016, the Company retired fully amortized capitalized software of $29.8 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.