Property and Equipment, net

3 Months Ended

Dec. 31, 2018

Property Plant And Equipment [Abstract]

6.Property and Equipment, net

Property and equipment, net consists of the following:

	Useful Life	December 31, 2018		September 30, 2018
Land	—	$	52,696	$	51,490
Buildings and leasehold improvements	2-40 yrs.		37,403		36,275
Operating equipment	2-7 yrs.		189,897		186,499
Transportation vehicles	3-7 yrs.		216,136		208,371
Office equipment and software	3-10 yrs.		55,433		57,976
Construction in progress	—		5,377		4,202
Property and equipment			556,942		544,813
Less: Accumulated depreciation			301,512		288,007
Property and equipment, net		$	255,430	$	256,806

Construction in progress includes costs incurred for software and other assets that have not yet been placed in service. Depreciation expense related to property and equipment was $19,281 and $21,072 for the three months ended December 31, 2018 and 2017, respectively.