PROPERTY, PLANT, AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

The Company depreciates and amortizes the cost of these assets, using the straight-line method as follows:

Asset Classification	Estimated Useful Life
Buildings and building improvements
Buildings	30–40 years
Leasehold and building improvements	2–40 years
Camp equipment	12–15 years
Vehicles	3–12 years
Equipment
Capitalized software and computer equipment	3–5 years
Solar equipment	20 years
Containers and railcars	15–20 years
All other equipment	8–20 years
Furniture and fixtures	5–8 years

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

	December 31, 2013		December 31, 2012 (As Adjusted)
Land	$	99,794	$	104,379
Asset retirement costs (non-landfill)	10,938		10,111
Landfill assets	100,983		77,952
Buildings and improvements	327,956		359,816
Camp equipment	187,831		135,827
Vehicles	425,296		385,172
Equipment	1,201,296		1,034,856
Furniture and fixtures	5,260		3,735
Construction in progress	58,010		34,124
	2,417,364		2,145,972
Less - accumulated depreciation and amortization	815,194		612,919
Total property, plant and equipment, net	$	1,602,170	$	1,533,053