Summarized Financial Information of Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011		Dec. 31, 2011
Segment Reporting Information [Line Items]
Revenues	$ 889,248	[1]	$ 849,801	[1]	$ 1,616,926	[1]	$ 1,749,041	[1]
Operating income (loss)	79,382		83,779		159,558		184,077
Capital expenditures	86,910	[2]	77,696	[2]	131,661	[2]	141,682	[2]
Depreciation and amortization	22,598		19,574		45,874		40,099
Assets, continuing operations	3,191,042				3,191,042				2,934,046
Assets, discontinued operations									58,768
Total Assets	3,191,042				3,191,042				2,992,814
Asia Pacific
Segment Reporting Information [Line Items]
Revenues	338,464		547,833		635,499		1,022,646
Operating income (loss)	46,605		58,511		104,039		97,390
Capital expenditures	21,666		11,431		38,231		38,417
Depreciation and amortization	5,235		6,616		10,092		12,352
Assets, continuing operations	1,187,914				1,187,914				934,134
Atlantic
Segment Reporting Information [Line Items]
Revenues	110,304		52,552		209,908		92,446
Operating income (loss)	(14,042)		(16,607)		(26,035)		(34,244)
Capital expenditures	52,615		54,148		64,490		82,900
Depreciation and amortization	6,111		3,448		13,295		7,241
Assets, continuing operations	345,218				345,218				419,258
Middle East
Segment Reporting Information [Line Items]
Revenues	440,480		249,416		771,519		633,949
Operating income (loss)	46,819		41,875		81,554		120,931
Capital expenditures	10,935		5,781		26,711		13,492
Depreciation and amortization	7,554		6,566		15,048		13,929
Assets, continuing operations	1,222,580				1,222,580				1,065,478
Corporate and Other
Segment Reporting Information [Line Items]
Capital expenditures	1,694		6,336		2,229		6,873
Depreciation and amortization	3,698		2,944		7,439		6,577
Assets, continuing operations	$ 435,330				$ 435,330				$ 515,176

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

[2] Total capital expenditures exclude approximately $1.3 million and $6.9 million in accrued capital expenditures for the six months ended June 30, 2012 and 2011, respectively.