Business Segment Information (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of summarized financial information concerning reportable segments

	Technical Services		Support Services		Corporate			(Loss) Gain on disposition of assets, net			Total
(in thousands)
2012
Revenues	$	1,794,015	$	151,008	$	—		$	—		$	1,945,023
Operating profit (loss)		420,231		45,912		(17,654	)		(6,099	)		442,390
Capital expenditures		277,686		46,053		5,197			—			328,936
Depreciation and amortization		183,762		30,707		430			—			214,899
Identifiable assets		1,128,124		175,611		63,428			—			1,367,163
2011
Revenues	$	1,663,793	$	146,014	$	—		$	—		$	1,809,807
Operating profit (loss)		451,259		51,672		(17,019	)		(3,831	)		482,081
Capital expenditures		369,568		42,837		3,995			—			416,400
Depreciation and amortization		152,252		27,464		189			—			179,905
Identifiable assets		1,103,341		177,974		56,896			—			1,338,211
2010
Revenues	$	979,834	$	116,550	$	—		$	—		$	1,096,384
Operating profit (loss)		217,144		31,086		(13,143	)		3,758			238,845
Capital expenditures		163,362		23,012		1,112			—			187,486
Depreciation and amortization		106,480		26,640		240			—			133,360
Identifiable assets		668,081		158,577		61,213			—			887,871

Schedule of revenues are presented based on the location of the use of the product or service

Years ended December 31,	2012		2011		2010
(in thousands)
United States Revenues	$	1,870,815	$	1,757,661	$	1,041,461
International Revenues		74,208		52,146		54,923
	$	1,945,023	$	1,809,807	$	1,096,384

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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