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Property and Equipment, net (Tables)
 9 Months Ended
Jun. 30, 2018
Property Plant And Equipment [Abstract]  
Schedule of Property and Equipment, Net

Property and equipment, net consists of the following:

 

 

 

Useful Life

 

June 30,

2018

 

 

September 30,

2017

 

Land

 

—

 

$

51,310

 

 

$

37,225

 

Buildings and leasehold improvements

 

2-40 yrs.

 

 

35,577

 

 

 

27,652

 

Operating equipment

 

3-7 yrs.

 

 

184,102

 

 

 

182,720

 

Transportation vehicles

 

3-7 yrs.

 

 

197,687

 

 

 

174,434

 

Office equipment and software

 

3-7 yrs.

 

 

60,554

 

 

 

47,042

 

Construction in progress

 

—

 

 

5,414

 

 

 

4,639

 

Property and equipment

 

 

 

 

534,644

 

 

 

473,712

 

Less: Accumulated depreciation

 

 

 

 

274,108

 

 

 

228,178

 

Property and equipment, net

 

 

 

$

260,536

 

 

$

245,534