Annual report pursuant to Section 13 and 15(d)

Contract Revenue and Percentage of Completion Method - Narrative (Details)

v3.3.1.900
Contract Revenue and Percentage of Completion Method - Narrative (Details)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
claim
Project
Dec. 31, 2013
USD ($)
Revenue from External Customer [Line Items]          
Loss on contracts     $ 33.9 $ 6.6 $ 30.8
Loss on contracts, number of projects | Project       2  
Percentage of revenue related to fabricated structures for delivery outside U.S     6.00% 10.00% 6.00%
Pass-through costs as a percentage of revenue     44.40% 48.20% 58.50%
Number of asserted liquidated damages claims settled | claim       1  
Amount of liquidated damages claim       $ 0.3  
Large Deepwater Project, Recently Delivered          
Revenue from External Customer [Line Items]          
Loss on contracts $ 10.3   $ 24.5    
Large Deepwater Project, Prior Years          
Revenue from External Customer [Line Items]          
Loss on contracts   $ 18.2      
Fabrication Facilities          
Revenue from External Customer [Line Items]          
Loss on contracts $ 7.6        
Loss on contract due to labor rate changes     $ 9.4