Acquisitions, Dispositions and Restructuring - Amounts Incurred and Amounts Expected to be Incurred in Future by Major Type of Cost and by Segment (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the year ended	$ 18,113	$ 35,727
Incurred from restructuring inception to December 31, 2014	53,840
Estimate of remaining amounts to be incurred	9,000
Total	62,840
Americas [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the year ended	9,170	34,066
Incurred from restructuring inception to December 31, 2014	43,236
Estimate of remaining amounts to be incurred	9,000
Total	52,236
Americas [Member] | Impairments and write offs [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the year ended	(1,240)	14,163
Incurred from restructuring inception to December 31, 2014	12,923
Total	12,923
Americas [Member] | Severance and other personnel-related costs [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the year ended	3,735	9,645
Incurred from restructuring inception to December 31, 2014	13,380
Estimate of remaining amounts to be incurred	476
Total	13,856
Americas [Member] | Morgan City yard-related expenses [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the year ended	6,675	4,175
Incurred from restructuring inception to December 31, 2014	10,850
Estimate of remaining amounts to be incurred	5,252
Total	16,102
Americas [Member] | Other [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the year ended		158
Incurred from restructuring inception to December 31, 2014	158
Estimate of remaining amounts to be incurred	3,272
Total	3,430
Americas [Member] | Morgan City environmental reserve [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the year ended		5,925
Incurred from restructuring inception to December 31, 2014	5,925
Total	5,925
Corporate [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the year ended	8,943	1,661
Incurred from restructuring inception to December 31, 2014	10,604
Total	10,604
Corporate [Member] | Severance and other personnel-related costs [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the year ended	938	1,661
Incurred from restructuring inception to December 31, 2014	2,599
Total	2,599
Corporate [Member] | Other [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the year ended	798
Incurred from restructuring inception to December 31, 2014	798
Total	798
Corporate [Member] | Legal and other advisor fees [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Incurred for the year ended	7,207
Incurred from restructuring inception to December 31, 2014	7,207
Total	$ 7,207