SIGNIFICANT ACCOUNTING POLICIES PROPERTY, PLANT AND EQUIPMENT (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Interest capitalized to fixed assets	$ 0.2	$ 0.5	$ 0.5
Depreciation and amortization expense	127.2	99.9	72.9
Estimated useful life, minimum (in years)	7 years 9 months 18 days
Minimum | Buildings
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	30 years
Minimum | Land, leasehold and building improvements
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	5 years
Minimum | Camp Equipment
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	12 years
Minimum | Vehicles
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	3 years
Minimum | Capitalized software and computer equipment
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	3 years
Minimum | Solar equipment
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	20 years
Minimum | Containers and railcars
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	15 years
Minimum | All other equipment
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	8 years
Minimum | Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	5 years
Maximum | Buildings
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	40 years
Maximum | Land, leasehold and building improvements
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	40 years
Maximum | Camp Equipment
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	15 years
Maximum | Vehicles
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	12 years
Maximum | Containers and railcars
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	20 years
Maximum | All other equipment
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	10 years
Maximum | Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life, minimum (in years)	8 years
Ville Mercier | Hazardous Waste Incinerator [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net Asset Carrying Value	$ 8.6