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Segment Information
9 Months Ended
Sep. 30, 2011
Segment Information [Abstract] 
Segment Information
 
18.   Segment Information
 
 
    In 2010, we began transitioning the operations of our company from a regional structure to a more centralized structure that focuses on global opportunities for our vessels. As a result, effective January 1, 2011, we have restructured our reporting segments from geographic regions to two new project segments: Construction and Installation and Other Offshore Services. Project work performed on a fixed-price or unit-price basis, where we take responsibility for managing a project scope that may include material procurement or third-party subcontractors and includes a substantial project management effort, will be reported in the Construction and Installation segment. These projects have a risk of loss due to productivity. Our diving operations and day-rate, time and materials, or cost plus projects, will be reported in the Other Offshore Services segment. The risk of loss on these projects is minimal. These changes have been reflected as retrospective changes to the financial information for the three and nine months ended September 30, 2010 presented below. These changes did not affect our Condensed Consolidated Balance Sheets, Condensed Consolidated Statements of Operations, or Condensed Consolidated Statements of Cash Flows.
   
  The following table presents information about the revenues and profit (or loss) of each of our reportable segments for the three and nine months ended September 30, 2011 and 2010:
    The following table presents information about the assets of each of our reportable segments as of September 30, 2011 and December 31, 2010.
                 
    September 30     December 31  
    2011     2010  
    (In thousands)  
Segment assets at period end
               
Construction and Installation
  $ 797,038     $ 780,786  
Other Offshore Services
    103,052       113,129  
Corporate
    341,436       449,826  
 
           
 
               
Consolidated segment assets at period end
  $ 1,241,526     $ 1,343,741