SEGMENT REPORTING (Tables)

3 Months Ended

Mar. 31, 2014

Segment Reporting [Abstract]

Reconciliation of third party revenues to direct revenues

The following table reconciles third party revenues to direct revenues for the three months ended March 31, 2014 and 2013 (in thousands). Third party revenue is revenue billed to outside customers by a particular segment. Direct revenue is the revenue allocated to the segment performing the provided service. The Company analyzes results of operations based on direct revenues because the Company believes that these revenues and related expenses best reflect the manner in which operations are managed. Intersegment revenues represent the sharing of third party revenues among the segments based on products and services provided by each segment as if the products and services were sold directly to the third party. The intersegment revenues are shown net. The negative intersegment revenues are due to more transfers out of customer revenues to other segments than transfers in of customer revenues from other segments.

	For the Three Months Ended March 31, 2014
	Technical Services		Oil Re-refining and Recycling			SK Environmental Services			Industrial and Field Services			Oil and Gas Field Services		Corporate Items			Totals
Third party revenues	$	236,781	$	137,986		$	152,322		$	215,676		$	103,751	$	151		$	846,667
Intersegment revenues, net	37,434		(56,213		)	28,054			(11,113		)	1,838		—			—
Corporate Items, net	399		—			(58		)	156			12		(509		)	—
Direct revenues	$	274,614	$	81,773		$	180,318		$	204,719		$	105,601	$	(358	)	$	846,667

	For the Three Months Ended March 31, 2013
	Technical Services		Oil Re-refining and Recycling			SK Environmental Services		Industrial and Field Services			Oil and Gas Field Services			Corporate Items			Totals
Third party revenues	$	233,939	$	146,931		$	152,955	$	221,418		$	116,696		$	(9,776	)	$	862,163
Intersegment revenues, net	24,419		(56,561		)	41,405		(13,356		)	4,093			—			—
Corporate Items, net	852		—			84		138			(151		)	(923		)	—
Direct revenues	$	259,210	$	90,370		$	194,444	$	208,200		$	120,638		$	(10,699	)	$	862,163

Reconciliation to consolidated statements of income to adjusted EBITDA

The following table presents information used by management for each reportable segment (in thousands). The Company does not allocate interest expense, income taxes, depreciation, amortization, accretion of environmental liabilities, pre-tax, non-cash acquisition accounting adjustments, and other income, to its segments.    

	For the Three Months Ended
	March 31,
	2014			2013
Adjusted EBITDA:
Technical Services	$	62,177		$	60,045
Oil Re-refining and Recycling	13,432			15,312
SK Environmental Services	21,976			27,040
Industrial and Field Services	34,141			36,346
Oil and Gas Field Services	16,299			27,551
Corporate Items	(46,039		)	(55,066		)
Total	$	101,986		$	111,228
Reconciliation to Consolidated Statements of Income:
Pre-tax, non-cash acquisition accounting inventory adjustment	—			13,559
Accretion of environmental liabilities	2,724			2,835
Depreciation and amortization	69,356			60,006
Income from operations	29,906			34,828
Other income	(4,178		)	(525		)
Interest expense, net of interest income	19,554			19,873
Income before provision for income taxes	$	14,530		$	15,480

PP&E, intangible assets and total assets by segment

The following table presents certain assets by reportable segment and in the aggregate (in thousands):

	March 31, 2014
	Technical Services		Oil Re-refining and Recycling		SK Environmental Services		Industrial and Field Services		Oil and Gas Field Services		Corporate Items		Totals
Property, plant and equipment, net	$	401,130	$	208,977	$	244,984	$	389,686	$	238,228	$	105,281	$	1,588,286
Goodwill	45,384		170,073		171,314		142,014		36,277		—		565,062
Permits and other intangible, net	78,405		157,966		261,894		32,751		26,195		—		557,211
Total assets	$	701,399	$	631,238	$	770,402	$	624,200	$	386,721	$	749,995	$	3,863,955

	December 31, 2013
	Technical Services		Oil Re-refining and Recycling		SK Environmental Services		Industrial and Field Services		Oil and Gas Field Services		Corporate Items		Totals
Property, plant and equipment, net	$	400,544	$	211,513	$	239,596	$	405,327	$	237,335	$	107,855	$	1,602,170
Goodwill	45,599		171,161		172,308		144,385		37,507		—		570,960
Permits and other intangible, net	80,302		160,807		265,104		35,332		28,428		—		569,973
Total assets	$	699,675	$	643,256	$	774,401	$	634,541	$	395,805	$	806,000	$	3,953,678

Total assets by geographical area

The following table presents total assets by geographical area (in thousands):

	March 31, 2014		December 31, 2013
United States	$	2,652,218	$	2,684,686
Canada	1,209,350		1,266,505
Other foreign	2,387		2,487
Total	$	3,863,955	$	3,953,678