Segment Reporting - Information about Service Lines and Operations in Different Geographic Areas (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues	$ 667,418	$ 805,857	$ 1,046,537	$ 550,463	$ 806,400	$ 414,595	$ 476,083	$ 603,811	$ 3,070,275	[1]	$ 2,300,889	[1]	$ 2,658,932	[1]
Installation Operations [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues									1,256,412		1,041,525		1,155,516
Fabrication Operations [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues									273,628		266,854		370,854
Project Services and Engineering Operations [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues									416,906		314,776		341,084
Procurement Activities [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues									1,123,329		677,734		791,478
Australia [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues									1,157,723		614,164		481,123
Saudi Arabia [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues									900,483		616,659		720,879
Mexico [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues									247,859		130,642		117,813
Brunei [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues									237,337
United Arab Emirates [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues									185,606		57,249		19,528
Brazil [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues									183,656		290,561		176,475
Indonesia [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues									54,288		150,205		144,538
Qatar [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues									46,873
United States [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues									32,858		148,606		126,986
Azerbaijan [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues											111,382		345,742
Malaysia [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues											98,004		329,689
Other countries [Member]
Segment Reporting Revenue Reconciling Item [Line Items]
Revenues									$ 23,592		$ 83,417		$ 196,159

[1] Intercompany transactions were not significant during 2015, 2014 and 2013.