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Restructuring - Restructuring Costs Incurred and Future Cost Expected to be Incurred (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Incurred for the period $ 2,484 $ 15,391 $ 8,851 $ 25,780
Incurred from inception to June 30, 2016 103,510   103,510  
Estimate of remaining amounts to be incurred 2,750   2,750  
Total 106,260   106,260  
Americas Restructuring [Member]        
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Incurred for the period (1,500) 2,441 (1,500) 4,236
Incurred from inception to June 30, 2016 44,044   44,044  
Total 44,044   44,044  
Corporate Restructuring [Member]        
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Incurred from inception to June 30, 2016 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 2,582 12,950 4,083 21,544
Incurred from inception to June 30, 2016 45,797   45,797  
Estimate of remaining amounts to be incurred 1,250   1,250  
Total 47,047   47,047  
AOR [Member]        
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Incurred for the period 1,402   6,268  
Incurred from inception to June 30, 2016 7,068   7,068  
Estimate of remaining amounts to be incurred 1,500   1,500  
Total 8,568   8,568  
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 June 30, 2016 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   2,502
Incurred from inception to June 30, 2016 13,981   13,981  
Total 13,981   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   820   1,734
Incurred from inception to June 30, 2016 12,557   12,557  
Total 12,557   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 June 30, 2016 158   158  
Total 158   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 for the period (1,500)   (1,500)  
Incurred from inception to June 30, 2016 4,425   4,425  
Total 4,425   4,425  
AEA [Member]        
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Incurred for the period (462) 3,339 1,874 6,386
Incurred from inception to June 30, 2016 54,756   54,756  
Estimate of remaining amounts to be incurred 250   250  
Total 55,006   55,006  
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, 2016 6,646   6,646  
Estimate of remaining amounts to be incurred 250   250  
Total 6,896   6,896  
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 1,022   3,208  
Incurred from inception to June 30, 2016 3,208   3,208  
Total 3,208   3,208  
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 June 30, 2016 692   692  
Total 692   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 16   166  
Incurred from inception to June 30, 2016 166   166  
Total 166   166  
MEA [Member]        
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Incurred for the period   304 17 911
Incurred from inception to June 30, 2016 873   873  
Total 873   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   304   911
Incurred from inception to June 30, 2016 856   856  
Total 856   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 June 30, 2016 17   17  
Total 17   17  
ASA [Member]        
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Incurred for the period 2,533 8,616 3,861 14,584
Incurred from inception to June 30, 2016 23,370   23,370  
Estimate of remaining amounts to be incurred 1,400   1,400  
Total 24,770   24,770  
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 992 1,786 1,425 3,586
Incurred from inception to June 30, 2016 7,529   7,529  
Estimate of remaining amounts to be incurred 1,000   1,000  
Total 8,529   8,529  
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   400  
Total 400   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 1,541 3,527 2,436 3,527
Incurred from inception to June 30, 2016 8,370   8,370  
Total 8,370   8,370  
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   3,303   7,471
Incurred from inception to June 30, 2016 7,471   7,471  
Total 7,471   7,471  
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 June 30, 2016 983   983  
Total 983   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   400   1,119
Incurred from inception to June 30, 2016 1,611   1,611  
Total 1,611   1,611  
Corporate [Member]        
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Incurred for the period 413 3,132 3,099 3,899
Incurred from inception to June 30, 2016 24,511   24,511  
Estimate of remaining amounts to be incurred 1,100   1,100  
Total 25,611   25,611  
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 51   836  
Incurred from inception to June 30, 2016 836   836  
Estimate of remaining amounts to be incurred 100   100  
Total 936   936  
Corporate [Member] | Other [Member] | AOR [Member]        
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]        
Incurred for the period 73   73  
Incurred from inception to June 30, 2016 73   73  
Estimate of remaining amounts to be incurred 1,000   1,000  
Total 1,073   1,073  
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 49 $ 2,732 222 $ 2,780
Incurred from inception to June 30, 2016 11,639   11,639  
Total 11,639   11,639  
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 240   1,968  
Incurred from inception to June 30, 2016 2,768   2,768  
Total $ 2,768   $ 2,768