PROPERTY, PLANT AND EQUIPMENT (Tables)

6 Months Ended

Jun. 30, 2017

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

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

	June 30, 2017		December 31, 2016
Land	$	121,114	$	120,575
Asset retirement costs (non-landfill)	14,861		14,567
Landfill assets	141,878		139,708
Buildings and improvements	406,030		373,160
Camp equipment	168,524		152,740
Vehicles	564,723		541,022
Equipment	1,605,581		1,483,736
Furniture and fixtures	5,524		5,492
Construction in progress	54,934		146,904
	3,083,169		2,977,904
Less - accumulated depreciation and amortization	1,480,716		1,366,077
Total property, plant and equipment, net	$	1,602,453	$	1,611,827