Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended				3 Months Ended	6 Months Ended		6 Months Ended	3 Months Ended		6 Months Ended									1 Months Ended	6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Project	Jun. 30, 2012	Dec. 31, 2012	Jun. 30, 2013 Minimum	Jun. 30, 2013 Maximum	Jun. 30, 2013 Backlog	Jun. 30, 2013 Atlantic	Jun. 30, 2013 Atlantic	Jun. 30, 2012 Atlantic	Jun. 30, 2013 Atlantic Backlog	Jun. 30, 2013 Atlantic Deferred profit recognition contracts	Jun. 30, 2012 Atlantic Deferred profit recognition contracts	Jun. 30, 2013 Atlantic Deferred profit recognition contracts Project	Jun. 30, 2012 Atlantic Deferred profit recognition contracts	Jun. 30, 2013 Asia Pacific Vessel	Jun. 30, 2012 Asia Pacific	Jun. 30, 2013 Asia Pacific Project One of Two	Jun. 30, 2013 Middle East Project	Jun. 30, 2012 Middle East Project	Jun. 30, 2013 Middle East Project EPCI projects	Mar. 19, 2012 Charter Fleet Business Vessel	Mar. 19, 2012 Secunda International Limited Vessel	Jun. 30, 2013 Unapproved claims	Jun. 30, 2012 Unapproved claims	Jun. 30, 2013 Consolidated Entities	Jun. 30, 2012 Consolidated Entities	Jun. 30, 2013 Consolidated Entities	Jun. 30, 2012 Consolidated Entities	Jun. 30, 2013 Unconsolidated joint ventures	Jun. 30, 2012 Unconsolidated joint ventures	Jun. 30, 2013 Unconsolidated joint ventures	Jun. 30, 2012 Unconsolidated joint ventures	Jun. 30, 2013 Fabrication Services [Member] Atlantic
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of vessels operated																							10
Number of vessels																								14
Unapproved change orders	$ 445,000,000		$ 445,000,000					$ 170,000,000
Percentage of completion to recognize expected profit									70.00%	70.00%
Number of projects accounted under deferred profit recognition policy															1
Revenues	647,250,000	889,248,000	1,454,738,000	1,616,926,000								211,900,000	37,000,000	7,900,000	42,100,000	13,100,000											11,000,000	29,000,000	39,400,000	38,500,000	0	1,000,000	3,700,000	5,000,000
Cost of operations	723,259,000	759,704,000	1,436,073,000	1,357,138,000									37,000,000	7,900,000	42,100,000	13,100,000									173,400,000	29,000,000	11,000,000	29,000,000	39,400,000	38,500,000	0	1,000,000	3,700,000	5,000,000
Net amount of revenues and costs included in our estimates relating to claims																									173,400,000	29,000,000
Claim amounts									10.00%	10.00%	13.00%						44.00%	14.00%		46.00%	73.00%
Number of Projects in Loss Position			3
Number of Projects, Majority Portion in Loss Position			2
Changes in project estimates																	62,000,000		66,000,000	38,000,000		43,000,000
Number of Vessel mobilized																	2
Incremental project losses									7,000,000	14,000,000																									3,000,000
Equity method of accounting investment ownership						20.00%	50.00%
Accounts receivable - other	65,627,000		65,627,000		75,461,000
Allowance for doubtful accounts	0		0		0
Contracts in progress			623,930,000		560,154,000
Advance billing on contracts			301,426,000		241,696,000
Income (loss) from continuing operations before provision for income taxes and noncontrolling interests	(140,235,000)	82,274,000	(88,604,000)	172,944,000
Provision for Income Taxes	5,902,000	28,345,000	33,215,000	57,088,000
Net operating loss carry forwards, valuation allowance	69,000,000		69,000,000
Deferred taxes related to net operating loss carry forwards	78,000,000		78,000,000
Deferred taxes expected to be realized through future taxable income	9,000,000		9,000,000
Deferred taxes related to net operating loss carry forwards	$ 133,000,000		$ 133,000,000