INCOME TAXES DEFERRED TAX ASSET AND LIABILITIES (Details) (USD $)				12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Restricted Stock	Dec. 31, 2013 Foreign Country
Deferred tax assets:
Workers compensation accrual	$ 11,825,000	$ 10,772,000
Provision for doubtful accounts	7,370,000	5,913,000
Closure, post-closure and remedial liabilities	53,302,000	54,941,000
Accrued expenses	19,671,000	19,198,000
Accrued compensation	5,681,000	2,506,000
Net operating loss carryforwards(1)	77,700,000	95,366,000
Tax credit carryforwards(2)	29,985,000	31,932,000
Uncertain tax positions accrued interest and federal benefit	1,949,000	2,200,000
Stock-based compensation	1,159,000	844,000
Other	2,170,000	2,570,000
Total deferred tax assets	210,812,000	226,242,000
Deferred tax liabilities:
Property, plant and equipment	(225,271,000)	(215,581,000)
Permits and other intangible assets	(159,223,000)	(160,531,000)
Total deferred tax liabilities	(384,494,000)	(376,112,000)
Total net deferred tax liability before valuation allowance	(173,682,000)	(149,870,000)
Less valuation allowance	(29,726,000)	(26,325,000)	(11,500,000)
Net deferred tax liabilities	(203,408,000)	(176,195,000)
State and local operating loss carryforwards	219,000,000
Domestic operating loss carryforwards	163,000,000
Operating loss carryforwards					49,000,000
Foreign tax credit carryforwards	29,985,000
Increase (decrease) tax benefit from stock options exercised				7,100,000
Income tax benefit related to stock option exercises				$ 1,400,000