Property, Plant and Equipment - Summary of Property Plant Equipment by Asset Category (Detail) - USD ($) $ in Thousands		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property Plant And Equipment [Line Items]
Property, Plant and Equipment		$ 2,467,352	$ 2,487,815
Less accumulated depreciation		(856,493)	(830,467)
Net Property, Plant and Equipment	[1]	1,610,859	1,657,348	$ 1,478,677
Marine Vessels [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment		1,391,556	1,241,105
Construction Equipment [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment		478,175	496,557
Building [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment		155,292	159,623
All other [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment		143,580	155,083
Construction in Progress [Member]
Property Plant And Equipment [Line Items]
Property, Plant and Equipment		$ 298,749	$ 435,447

[1] Our marine vessels are included in the country in which they were located as of year-end.