BUSINESS COMBINATIONS (Evergreen Oil, Inc) (Details) (USD $)					0 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Evergreen Oil, Inc	Sep. 13, 2013 Evergreen Oil, Inc	May 30, 2014 Privately Owned Domestic Company	Dec. 31, 2013 Preliminary Allocations Evergreen Oil, Inc	Jun. 30, 2014 Measurement Period Adjustments Evergreen Oil, Inc
Business Acquisition [Line Items]
Outstanding common shares acquired (as a percent)				100.00%
Summary of recognized assets acquired and liabilities assumed
Inventories and supplies			$ 1,089,000			$ 1,089,000	$ 0
Prepaid and other current assets			1,018,000			1,291,000	(273,000)
Property, plant and equipment			40,563,000			40,563,000	0
Permits and other intangibles			17,100,000			17,100,000	0
Deferred tax assets, less current portion			0			2,368,000	(2,368,000)
Other assets			3,368,000			3,607,000	(239,000)
Current liabilities			(5,980,000)			(6,198,000)	218,000
Closure and post-closure liabilities			(659,000)			(659,000)	0
Remedial liabilities, less current portion			(1,640,000)			(2,103,000)	463,000
Deferred taxes, unrecognized tax benefits and other long-term liabilities			(2,059,000)			(1,139,000)	(920,000)
Total identifiable net assets			52,800,000			55,919,000	(3,119,000)
Goodwill	578,974,000	570,960,000	3,518,000			0	3,518,000
Total			56,318,000			55,919,000	399,000
Purchase price of acquisition					$ 6,200,000