PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2,646,960		$ 2,646,960		$ 2,564,340
Less - accumulated depreciation and amortization	1,084,706		1,084,706		1,005,506
Total property, plant and equipment, net	1,562,254		1,562,254		1,558,834
Interest Costs Capitalized Adjustment	400	$ 200	600	$ 300
Depreciation inclusive of amortization	58,900	$ 57,200	116,300	$ 117,100
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	99,929		99,929		98,507
Asset retirement costs (non-landfill)
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	12,498		12,498		10,871
Landfill assets
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	121,054		121,054		110,984
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	344,059		344,059		338,242
Camp equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	166,210		166,210		180,575
Vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	499,921		499,921		471,615
Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	1,316,034		1,316,034		1,302,424
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	5,412		5,412		5,517
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 81,843		$ 81,843		$ 45,605