CLOSURE AND POST-CLOSURE LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	7 Months Ended	12 Months Ended		4 Months Ended	13 Months Ended		12 Months Ended
	Jul. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 07, 2012 Senior Notes Unsecured Senior Notes 2020	Dec. 31, 2013 Senior Notes Unsecured Senior Notes 2020	Jul. 30, 2012 Senior Notes Unsecured Senior Notes 2020	Dec. 31, 2013 Landfill Retirement Liability	Dec. 31, 2012 Landfill Retirement Liability	Dec. 31, 2013 Non-Landfill Retirement Liability	Dec. 31, 2012 Non-Landfill Retirement Liability
Changes to post-closure liabilities
Balance at the beginning of the period	$ 34,881	$ 44,047	$ 34,881				$ 26,658	$ 25,764	$ 17,389	$ 9,117
Liabilities assumed in Safety-Kleen acquisition		659	7,553					0	659	7,553
New asset retirement obligations		4,515	3,257				4,515	3,257
Accretion		4,746	3,993				3,016	2,897	1,730	1,096
Changes in estimates recorded to statement of income		(362)	1,194				(409)	133	47	1,061
Changes in estimates recorded to balance sheet		(1,516)	(3,071)				(1,697)	(3,086)	181	15
Expenditures		(4,522)	(3,845)				(4,175)	(2,382)	(347)	(1,463)
Currency translation and other		(482)	85				(304)	75	(178)	10
Balance at the end of the period		47,085	44,047				27,604	26,658	19,481	17,389
Long-term Debt, Gross				600,000		800,000
Credit-adjusted risk-free rate (as a percent)	8.56%
Asset Retirement Obligations Discount Rate (as a percent)				6.66%	6.60%
Environmental Property Sale, Disposal or Abandonment Costs
2014		7,017
2015		8,607
2016		6,860
2017		4,526
2018		8,164
Thereafter		259,837
Undiscounted closure and post-closure liabilities		295,011
Less: Discount at credit-adjusted risk-free rate		(160,091)
Less: Undiscounted estimated closure and post-closure liabilities relating to airspace not yet consumed		(87,835)
Present value of closure and post-closure liabilities		$ 47,085	$ 44,047				$ 27,604	$ 26,658	$ 19,481	$ 17,389