COMMITMENTS AND CONTINGENCIES OTHER CONTINGENCIES (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Product Liability Contingency [Line Items]
Deductible per Occurrence for Workers Compensation, General Liability and Vehicle Liability	$ 500,000
Rentention for Enviromental Impairment	1,000,000
Self-Insurance Liabilities	35,100,000	12,900,000
Weighted average risk free discount rate for self insurance liabilities	0.50%	0.69%
2013	10,056,000
2014	6,824,000
2015	5,548,000
2016	3,487,000
2017	2,407,000
Thereafter	6,920,000
Undiscounted self-insurance liabilities	35,242,000
Less: Discount	125,000
Total self-Insurance liabilities (included in accrued expenses)	35,117,000
Minimum
Product Liability Contingency [Line Items]
Deductible Health Insurance Policy	250,000
Maximum
Product Liability Contingency [Line Items]
Deductible Health Insurance Policy	275,000
Safety-Kleen [Member]
Product Liability Contingency [Line Items]
Deductible per Occurrence for Workers Compensation	1,000,000
Deductible per Occurrence for General Liability	2,000,000
Deductible per Occurrence for Vehicle Liability	$ 5,000,000