Restructuring - Restructuring Costs Incurred and Future Cost Expected to be Incurred (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	$ 6,367	$ 10,389
Incurred from inception to March 31, 2016	101,026
Estimate of remaining amounts to be incurred	8,751
Total	109,777
Americas Restructuring [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period		1,795
Incurred from inception to March 31, 2016	45,544
Total	45,544
Corporate Restructuring [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred from inception to March 31, 2016	6,601
Total	6,601
MPI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	1,501	8,594
Incurred from inception to March 31, 2016	43,215
Estimate of remaining amounts to be incurred	4,615
Total	47,830
AOR [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	4,866
Incurred from inception to March 31, 2016	5,666
Estimate of remaining amounts to be incurred	4,136
Total	9,802
Impairments and write offs [Member] | Americas Restructuring [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred from inception to March 31, 2016	12,923
Total	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		881
Incurred from inception to March 31, 2016	13,981
Total	13,981
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		914
Incurred from inception to March 31, 2016	12,557
Total	12,557
Other [Member] | Americas Restructuring [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred from inception to March 31, 2016	158
Total	158
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 March 31, 2016	5,925
Total	5,925
AEA [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	2,336	3,047
Incurred from inception to March 31, 2016	55,218
Estimate of remaining amounts to be incurred	795
Total	56,013
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		1,252
Incurred from inception to March 31, 2016	6,646
Total	6,646
AEA [Member] | Severance and other personnel-related costs [Member] | AOR [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	2,186
Incurred from inception to March 31, 2016	2,186
Estimate of remaining amounts to be incurred	795
Total	2,981
AEA [Member] | Other [Member] | MPI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred from inception to March 31, 2016	692
Total	692
AEA [Member] | Other [Member] | AOR [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	150
Incurred from inception to March 31, 2016	150
Total	150
MEA [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	17	607
Incurred from inception to March 31, 2016	873
Total	873
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		607
Incurred from inception to March 31, 2016	856
Total	856
MEA [Member] | Other [Member] | AOR [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	17
Incurred from inception to March 31, 2016	17
Total	17
ASA [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	1,328	5,968
Incurred from inception to March 31, 2016	20,837
Estimate of remaining amounts to be incurred	5,015
Total	25,852
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	433	1,800
Incurred from inception to March 31, 2016	6,537
Estimate of remaining amounts to be incurred	1,898
Total	8,435
ASA [Member] | Severance and other personnel-related costs [Member] | AOR [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Estimate of remaining amounts to be incurred	400
Total	400
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	895
Incurred from inception to March 31, 2016	6,829
Estimate of remaining amounts to be incurred	2,327
Total	9,156
ASA [Member] | Asset impairment and disposal [Member] | MPI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period		4,168
Incurred from inception to March 31, 2016	7,471
Total	7,471
ASA [Member] | Legal and other advisor fees [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	390
Total	390
Corporate and Other [Member] | MPI [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred from inception to March 31, 2016	983
Total	983
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		719
Incurred from inception to March 31, 2016	1,611
Total	1,611
Corporate [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	2,686	767
Incurred from inception to March 31, 2016	24,098
Estimate of remaining amounts to be incurred	2,941
Total	27,039
Corporate [Member] | Severance and other personnel-related costs [Member] | AOR [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	785
Incurred from inception to March 31, 2016	785
Estimate of remaining amounts to be incurred	472
Total	1,257
Corporate [Member] | Other [Member] | AOR [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Estimate of remaining amounts to be incurred	2,469
Total	2,469
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	173	$ 48
Incurred from inception to March 31, 2016	11,590
Total	11,590
Corporate [Member] | Legal and other advisor fees [Member] | AOR [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the period	1,728
Incurred from inception to March 31, 2016	2,528
Total	$ 2,528