Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2018

Property, Plant and Equipment [Abstract]

Schedule of Property Equipment

Depreciation and amortization are computed using the straight-line method over the following estimated useful lives:  

Buildings	5 to 25 years
Vehicles and equipment	2 to 10 years
Software and computers	3 to 5 years
Furniture and fixtures	6 months to 10 years
Machinery and equipment	3 to 10 years
Leasehold improvements	Lesser of useful life or lease term

Property and equipment as of December 31, 2018 and December 31, 2017, consists of the following (in thousands):

	December 31, 2018			December 31, 2017
Vehicles and equipment	$	137,033		$	108,130
Buildings and leasehold improvements	28,067			21,825
Machinery and equipment	26,163			20,849
Software and computers	24,068			23,526
Land	8,133			14,041
Assets to be placed into service	2,419			—
Furniture and fixtures	1,750			1,464
	227,633			189,835
Less: accumulated depreciation	(75,992		)	(45,311		)
	$	151,641		$	144,524