SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition and Deferred Revenue (Details) (S K Environmental Services [Member])	6 Months Ended
	Jun. 30, 2013
Parts cleaning services [Member] | Minimum [Member]
Segment Reporting Information [Line Items]
Service period	49 days
Parts cleaning services [Member] | Maximum [Member]
Segment Reporting Information [Line Items]
Service period	98 days
Containerized waste services [Member]
Segment Reporting Information [Line Items]
Revenue deferral period	two and one-half weeks