Property and Equipment (Tables)

6 Months Ended

Jun. 30, 2019

Property, Plant and Equipment [Abstract]

Components of Property Plant and Equipment

Property, plant and equipment consisted of the following (in thousands):

	June 30, 2019			December 31, 2018			Estimated Useful Lives
Vehicles	$	44,620		$	45,050		3 - 5 years
Computer equipment and software	58,489			53,891			3 - 5 years
Leasehold improvements	27,977			26,401			2 - 15 years
Office furniture, fixtures and equipment	20,416			19,532			7 years
Build-to-suit lease building	—			8,247			10.5 years
Construction in process	3,076			2,975
Property, plant and equipment, gross	154,578			156,096
Accumulated depreciation and amortization	(92,978		)	(82,695		)
Property, plant and equipment, net	$	61,600		$	73,401