SEGMENT REPORTING (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 segment	Sep. 30, 2013
Segment reporting information
Number of reportable segments			6
Number of operations for which the revenues are insignificant			2
Adjusted EBITDA, Total	$ 153,357	$ 145,952	$ 391,142	$ 380,770
Reconciliation to Consolidated Statements of (Loss) Income:
Pre-tax, non-cash acquisition accounting inventory adjustment	0	0	0	13,559
Accretion of environmental liabilities	2,642	2,914	7,975	8,628
Depreciation and amortization	70,049	69,430	205,480	196,904
Goodwill impairment charge	123,414	0	123,414	0
(Loss) income from operations	(42,748)	73,608	54,273	161,679
Other (income) expense	(613)	150	(4,136)	(2,030)
Interest expense, net of interest income	19,494	19,326	58,430	58,784
(Loss) income before provision for income taxes	(61,629)	54,132	(21)	104,925
Technical Services
Segment reporting information
Adjusted EBITDA, Total	86,928	78,849	233,402	208,284
Industrial and Field Services
Segment reporting information
Adjusted EBITDA, Total	20,303	26,709	67,391	75,281
Oil Re-refining and Recycling
Segment reporting information
Adjusted EBITDA, Total	21,473	18,652	49,252	46,750
SK Environmental Services
Segment reporting information
Adjusted EBITDA, Total	30,853	23,192	84,985	84,274
Lodging Services
Segment reporting information
Adjusted EBITDA, Total	15,972	21,710	49,196	63,270
Oil and Gas Field Services
Segment reporting information
Adjusted EBITDA, Total	9,545	20,530	27,688	52,458
Corporate Items
Segment reporting information
Adjusted EBITDA, Total	$ (31,717)	$ (43,690)	$ (120,772)	$ (149,547)