SUBSEQUENT EVENTS (Details) (USD $)	3 Months Ended		0 Months Ended				0 Months Ended
	Mar. 31, 2014	Mar. 31, 2014 5-year Revolving Credit Facility	Apr. 28, 2014 Subsequent event	Apr. 02, 2014 Subsequent event	Apr. 07, 2014 Subsequent event EQ landfill facility center	Apr. 07, 2014 Subsequent event EQ Credit facility	Apr. 07, 2014 Subsequent event EQ 7-year Term Loan	Apr. 07, 2014 Subsequent event EQ 5-year Revolving Credit Facility
SUBSEQUENT EVENTS
Quarterly dividend declared (in dollars per share)				$ 0.18
Dividend paid in cash	$ 3,874,000		$ 3,900,000
Number of hazardous waste permitted landfill					1
Number of waste treatment and recycling facility					13
Number of dedicated service centers					21
Business acquisition transaction value					465,000,000
Credit facility, maximum borrowing capacity	$ 95,000,000	$ 20,000,000				$ 540,000,000	$ 415,000,000	$ 125,000,000
Term of debt							7 years	5 years