GOODWILL AND OTHER INTANGIBLE ASSETS (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	12 years 69 days	13 years 84 days
Permits
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	19 years 219 days	21 years 9 months 18 days
Supplier relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	12 years 22 days	12 years 343 days
Other intangible assets
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (in years)	3 years 110 days	2 years 350 days
Evergreen Oil, Inc.
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	$ 17,100
Weighted Average Amortization Period (in years)	12 years 146 days
Evergreen Oil, Inc. | Permits
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	10,000
Weighted Average Amortization Period (in years)	25 years
Evergreen Oil, Inc. | Supplier relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	6,500
Weighted Average Amortization Period (in years)	7 years
Evergreen Oil, Inc. | Other intangible assets
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	$ 600
Weighted Average Amortization Period (in years)	12 years