Summarized Financial Information of Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011		Dec. 31, 2011
Segment Reporting Information [Line Items]
Revenues	$ 727,678	[1]	$ 899,240	[1]
Operating income	80,176		100,298
Capital expenditures	44,751	[2]	63,986	[2]
Depreciation and amortization	23,276		20,525
Assets, continuing operations	3,065,394				2,934,046
Assets, discontinued operations					58,768
Total Assets	3,065,394				2,992,814
Asia Pacific
Segment Reporting Information [Line Items]
Revenues	297,035		474,813
Operating income	57,434		38,879
Capital expenditures	16,565		26,986
Depreciation and amortization	4,857		5,736
Assets, continuing operations	1,065,504				934,134
Atlantic
Segment Reporting Information [Line Items]
Revenues	99,604		39,894
Operating income	(11,993)		(17,637)
Capital expenditures	11,875		28,752
Depreciation and amortization	7,184		3,793
Assets, continuing operations	326,337				419,258
Middle East
Segment Reporting Information [Line Items]
Revenues	331,039		384,533
Operating income	34,735		79,056
Capital expenditures	15,776		7,711
Depreciation and amortization	7,494		7,363
Assets, continuing operations	1,185,590				1,065,478
Corporate and other
Segment Reporting Information [Line Items]
Capital expenditures	535		537
Depreciation and amortization	3,741		3,633
Assets, continuing operations	$ 487,963				$ 515,176

[1] Intersegment transactions included in revenues were not significant for either of the periods presented.

[2] Total capital expenditures exclude approximately $13 million and $4 million in accrued capital expenditures for the three months ended March 31, 2012 and 2011, respectively.