REMEDIAL LIABILITIES (Changes in Remedial Liabilities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Changes to remedial liabilities
Balance at the beginning of the period	$ 155,121	$ 172,498
Adjustments during the measurement period related to Evergreen		(536)
Accretion	5,764	6,154
Changes in estimates recorded to statement of income (loss)	(11,388)	(2,718)
Expenditures	(14,007)	(18,119)
Currency translation and other	(3,498)	(2,158)
Balance at the end of the period	131,992	155,121
Remedial Liabilities for Landfill Sites
Changes to remedial liabilities
Balance at the beginning of the period	5,420	5,624
Adjustments during the measurement period related to Evergreen		0
Accretion	218	266
Changes in estimates recorded to statement of income (loss)	(2,841)	(113)
Expenditures	(137)	(109)
Currency translation and other	(333)	(248)
Balance at the end of the period	2,327	5,420
Remedial Liabilities for Inactive Sites
Changes to remedial liabilities
Balance at the beginning of the period	68,528	74,262
Adjustments during the measurement period related to Evergreen		0
Accretion	2,924	2,975
Changes in estimates recorded to statement of income (loss)	(2,927)	(2,645)
Expenditures	(4,779)	(5,940)
Currency translation and other	(133)	(124)
Balance at the end of the period	63,613	68,528
Remedial Liabilities (Including Superfund) for Non-Landfill Operations
Changes to remedial liabilities
Balance at the beginning of the period	81,173	92,612
Adjustments during the measurement period related to Evergreen		(536)
Accretion	2,622	2,913
Changes in estimates recorded to statement of income (loss)	(5,620)	40
Expenditures	(9,091)	(12,070)
Currency translation and other	(3,032)	(1,786)
Balance at the end of the period	$ 66,052	$ 81,173