PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 2,878,967		$ 2,878,967		$ 2,691,738
Less - accumulated depreciation and amortization	1,283,980		1,283,980		1,159,271
Total property, plant and equipment, net	1,594,987		1,594,987		1,532,467
Interest costs capitalized adjustment	1,300	$ 400	2,500	$ 600
Depreciation inclusive of amortization	63,500	$ 58,900	122,800	$ 116,300
Land
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	104,533		104,533		100,582
Asset retirement costs (non-landfill)
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	12,187		12,187		12,434
Landfill assets
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	144,540		144,540		136,624
Buildings and improvements
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	354,470		354,470		344,209
Camp equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	158,394		158,394		149,361
Vehicles
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	538,170		538,170		500,619
Equipment
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	1,414,946		1,414,946		1,328,915
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	5,528		5,528		5,337
Construction in progress
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 146,199		$ 146,199		$ 113,657