Acquisition and Dispositions - Additional Information (Detail) (USD $)	3 Months Ended				6 Months Ended	9 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	0 Months Ended	6 Months Ended	0 Months Ended
	Sep. 30, 2014 Vessel	Jun. 30, 2014	Dec. 31, 2013 JointVentures	Mar. 31, 2013	Jun. 30, 2014	Sep. 30, 2014	Jun. 30, 2014 Morgan City Facility [Member]	Dec. 31, 2013 Lay Vessel One Zero Eight [Member]	Jun. 30, 2014 Lay Vessel One Zero Eight [Member]	Apr. 30, 2014 Texas [Member] Harbor Island Facility [Member]	Jun. 30, 2014 Americas [Member]	Apr. 30, 2014 Americas [Member] Harbor Island Facility [Member]	Dec. 31, 2013 THHE Fabricators Sdn. Bhd [Member]	Dec. 31, 2013 Berlian McDermott Sdn, Bhd, [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Total purchase consideration				$ 9,000,000
Purchase consideration - cash				6,000,000
Purchase consideration - restricted shares				313,580
Number of joint ventures entered			2
Percentage of interest acquired in subsidiary													30.00%	30.00%
Equity method investment recorded		25,500,000			25,500,000
Non controlling interest of equity method investment		20,900,000			20,900,000
Increase in capital in excess of par value					4,600,000
Number of vessels held for sale	4
Proceeds from sale of discontinued assets	16,100,000	8,400,000				32,000,000	13,600,000			31,700,000
Gain on sale of assets	4,700,000	6,400,000				12,500,000	11,400,000				1,300,000	25,000,000
Estimated cancellation cost									10,700,000
Impairment charges								37,800,000
Accrued liabilities associated with restructuring activities	$ 5,300,000		$ 8,000,000			$ 5,300,000