Restructuring - Amounts Incurred and Amounts Expected to be Incurred in Future by Major Type of Cost and by Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Mar. 31, 2015
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	$ 15,391	$ 1,263	$ 25,780	$ 7,388
Incurred from inception to June 30, 2015	79,620		79,620
Estimate of remaining amounts to be incurred	16,834		16,834
Total	96,454		96,454
Americas Restructuring [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	2,441	932	4,236	4,563
Incurred from inception to June 30, 2015	47,472		47,472
Estimate of remaining amounts to be incurred	707		707
Total	48,179		48,179
Corporate Restructuring
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period		331		2,825
Incurred from inception to June 30, 2015	6,601		6,601
Total	6,601		6,601
MPI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	12,950		21,544
Incurred from inception to June 30, 2015	25,547		25,547
Estimate of remaining amounts to be incurred	16,127		16,127
Total	41,674		41,674
Impairments and write offs [Member] | Americas Restructuring [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period		(1,340)		(1,340)
Incurred from inception to June 30, 2015	12,923		12,923
Total	12,923		12,923
Severance and other personnel-related costs [Member] | Americas Restructuring [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	1,621	1,225	2,502	3,254
Incurred from inception to June 30, 2015	15,882		15,882
Total	15,882		15,882
Severance and other personnel-related costs [Member] | Corporate Restructuring
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period				908
Incurred from inception to June 30, 2015	2,599		2,599
Total	2,599		2,599
Morgan City yard-related expenses [Member] | Americas Restructuring [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	820	1,047	1,734	2,649
Incurred from inception to June 30, 2015	12,584		12,584
Estimate of remaining amounts to be incurred	707		707
Total	13,291		13,291
Other [Member] | Americas Restructuring [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred from inception to June 30, 2015	158		158
Total	158		158
Other [Member] | Corporate Restructuring
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred from inception to June 30, 2015	798		798
Total	798		798
Legal and other advisor fees [Member] | Corporate Restructuring
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period		$ 331		$ 1,917
Incurred from inception to June 30, 2015	3,204		3,204
Total	3,204		3,204
Legal and other advisor fees [Member] | MPI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred from inception to June 30, 2015					$ 4,000
Morgan City environmental reserve [Member] | Americas Restructuring [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred from inception to June 30, 2015	5,925		5,925
Total	5,925		5,925
AEA [Member] | Severance and other personnel-related costs [Member] | MPI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	898		2,150
Incurred from inception to June 30, 2015	2,150		2,150
Estimate of remaining amounts to be incurred	6,379		6,379
Total	8,529		8,529
MEA [Member] | Severance and other personnel-related costs [Member] | MPI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	304		911
Incurred from inception to June 30, 2015	911		911
Estimate of remaining amounts to be incurred	500		500
Total	1,411		1,411
ASA [Member] | Severance and other personnel-related costs [Member] | MPI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	1,786		3,586
Incurred from inception to June 30, 2015	3,586		3,586
Estimate of remaining amounts to be incurred	1,100		1,100
Total	4,686		4,686
ASA [Member] | Other [Member] | MPI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	3,527		3,527
Incurred from inception to June 30, 2015	3,527		3,527
Total	3,527		3,527
ASA [Member] | Asset impairment [Member] | MPI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	3,303		7,471
Incurred from inception to June 30, 2015	7,471		7,471
Total	7,471		7,471
Corporate and Other [Member] | Severance and other personnel-related costs [Member] | MPI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	400		1,119
Incurred from inception to June 30, 2015	1,119		1,119
Estimate of remaining amounts to be incurred	5,000		5,000
Total	6,119		6,119
Corporate and Other [Member] | Other [Member] | MPI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Estimate of remaining amounts to be incurred	948		948
Total	948		948
Corporate [Member] | Legal and other advisor fees [Member] | MPI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	2,732		2,780
Incurred from inception to June 30, 2015	6,783		6,783
Estimate of remaining amounts to be incurred	2,200		2,200
Total	$ 8,983		$ 8,983