Revenue Recognition - Additional Information (Detail)		3 Months Ended		9 Months Ended
		Sep. 30, 2015 USD ($) Project Contract	Sep. 30, 2014 USD ($) Project Contract	Sep. 30, 2015 USD ($) Project Contract	Sep. 30, 2014 USD ($) Project Contract
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Unapproved change orders		$ 146,100,000	$ 352,300,000	$ 146,100,000	$ 352,300,000
Revenues	[1]	805,857,000	414,595,000	2,402,857,000	1,494,489,000
Cost of operations		$ 720,961,000	$ 370,271,000	$ 2,121,942,000	$ 1,394,062,000
Number of projects accounted under deferred profit recognition policy | Project		0	0	0	0
Number of contracts | Contract		0	0	0	0
Brazil [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Charter contract term				5 years
MEA [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Revenues	[1]	$ 318,346,000	$ 91,659,000	$ 892,367,000	$ 588,195,000
AEA [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Revenues	[1]	96,371,000	117,509,000	344,385,000	425,060,000
Claims Revenue [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Revenues		0	0	0	0
Cost of operations		0	0	0	0
Claims Revenue [Member] | MEA [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Revenues				9,800,000	6,500,000
Cost of operations				9,800,000	6,500,000
Backlog [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Unapproved change orders		$ 22,500,000	$ 168,900,000	22,500,000	$ 168,900,000
Backlog [Member] | MEA [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Loss on contracts				$ 168,000,000
Project completion year				2017
Backlog [Member] | AEA [Member] | Mexico [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Loss on contracts				$ 86,000,000
Backlog Related to Active Projects [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Loss on contracts				317,000,000
Backlog Associated with Charter of Agile [Member] | AEA [Member] | Brazil [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Loss on contracts				$ 61,000,000
Project completion year				2017
Active Projects [Member]
Revenue Recognition Multiple Deliverable Arrangements [Line Items]
Number of projects accounted under deferred profit recognition policy | Project				3

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