SEGMENT REPORTING (Tables)

9 Months Ended

Sep. 30, 2012

Segment Reporting [Abstract]

Reconciliation of third party revenues to direct revenues

The following table reconciles third party revenues to direct revenues for the three and nine months ended September 30, 2012 and 2011 (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.

	For the Three Months Ended September 30, 2012
	Technical Services		Field Services			Industrial Services			Oil and Gas Field Services		Corporate Items			Totals
Third party revenues	$	236,605	$	60,194		$	149,120		$	87,619	$	268		$	533,806
Intersegment revenues, net	5,501		(2,531		)	(4,599		)	2,296		(667		)	—
Direct revenues	$	242,106	$	57,663		$	144,521		$	89,915	$	(399	)	$	533,806

	For the Three Months Ended September 30, 2011
	Technical Services		Field Services			Industrial Services			Oil and Gas Field Services			Corporate Items			Totals
Third party revenues	$	221,424	$	105,181		$	123,639		$	105,546		$	263		$	556,053
Intersegment revenues, net	6,934		(5,661		)	(171		)	(532		)	(570		)	—
Direct revenues	$	228,358	$	99,520		$	123,468		$	105,014		$	(307	)	$	556,053

	For the Nine Months Ended September 30, 2012
	Technical Services		Field Services			Industrial Services			Oil and Gas Field Services		Corporate Items			Totals
Third party revenues	$	676,074	$	174,557		$	458,858		$	318,158	$	1,299		$	1,628,946
Intersegment revenues, net	22,779		(10,309		)	(19,970		)	8,962		(1,462		)	—
Direct revenues	$	698,853	$	164,248		$	438,888		$	327,120	$	(163	)	$	1,628,946

	For the Nine Months Ended September 30, 2011
	Technical Services		Field Services			Industrial Services			Oil and Gas Field Services		Corporate Items			Totals
Third party revenues	$	633,187	$	216,377		$	351,534		$	236,553	$	599		$	1,438,250
Intersegment revenues, net	17,181		(13,279		)	(7,217		)	4,859		(1,544		)	—
Direct revenues	$	650,368	$	203,098		$	344,317		$	241,412	$	(945	)	$	1,438,250

Reconciliation to consolidated statements of income to adjusted EBITDA

The following table presents information used by management by reported segment (in thousands). The Company does not allocate interest expense, income taxes, depreciation, amortization, accretion of environmental liabilities, other expense (income), and loss on early extinguishment of debt to its segments.

	For the Three Months Ended						For the Nine Months Ended
	September 30,						September 30,
	2012			2011			2012			2011
Adjusted EBITDA:
Technical Services	$	67,332		$	62,531		$	184,874		$	174,033
Field Services	5,707			19,318			15,599			31,527
Industrial Services	37,860			25,933			107,452			77,630
Oil and Gas Field Services	14,752			25,062			60,961			45,748
Corporate Items	(25,124		)	(29,013		)	(78,710		)	(76,289		)
Total	$	100,527		$	103,831		$	290,176		$	252,649
Reconciliation to Consolidated Statements of Income:
Accretion of environmental liabilities	$	2,488		$	2,435		$	7,409		$	7,231
Depreciation and amortization	41,300			34,604			116,794			87,000
Income from operations	56,739			66,792			165,973			158,418
Other expense (income)	91			(164		)	465			(5,931		)
Loss on early extinguishment of debt	26,385			—			26,385			—
Interest expense, net of interest income	11,596			10,927			33,836			28,047
Income before provision for income taxes	$	18,667		$	56,029		$	105,287		$	136,302

PP&E and intangible assets by segment

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

	September 30, 2012		December 31, 2011
Property, plant and equipment, net
Technical Services	$	323,159	$	308,118
Field Services	35,323		30,296
Industrial Services	301,748		254,469
Oil and Gas Field Services	278,245		267,987
Corporate Items	64,939		43,077
Total property, plant and equipment, net	$	1,003,414	$	903,947
Intangible assets:
Technical Services
Goodwill	$	45,473	$	44,410
Permits and other intangibles, net	79,615		81,605
Total Technical Services	125,088		126,015
Field Services
Goodwill	2,232		2,232
Permits and other intangibles, net	3,140		1,204
Total Field Services	5,372		3,436
Industrial Services
Goodwill	69,870		45,444
Permits and other intangibles, net	34,537		19,701
Total Industrial Services	104,407		65,145
Oil and Gas Field Services
Goodwill	40,149		30,306
Permits and other intangibles, net	34,518		37,134
Total Oil and Gas Field Services	74,667		67,440
Total	$	309,534	$	262,036

Total assets by segment

The following table presents the total assets by reported segment (in thousands):

	September 30, 2012		December 31, 2011
Technical Services	$	619,868	$	604,904
Field Services	47,001		37,850
Industrial Services	445,048		345,202
Oil and Gas Field Services	377,938		429,938
Corporate Items	959,548		667,909
Total	$	2,449,403	$	2,085,803

Total assets by geographical area

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

	September 30, 2012		December 31, 2011
United States	$	1,427,861	$	1,119,491
Canada	1,021,542		961,936
Other foreign	—		4,376
Total	$	2,449,403	$	2,085,803