Quarterly report pursuant to Section 13 or 15(d)

Contract Costs (Details)

v3.4.0.3
Contract Costs (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2016
USD ($)
Customer
Project
Mar. 31, 2015
Dec. 31, 2015
USD ($)
Long-term Contracts or Programs Disclosure [Line Items]      
Pass-through costs as a percentage of revenue 40.00% 44.70%  
Costs and estimated earnings in excess of billings on uncompleted contracts $ 13,891   $ 12,822
Customer advances $ 3,300    
Number of major customers, advances | Customer 2    
Revisions to revenue $ (488)    
Unbilled Contract Costs      
Long-term Contracts or Programs Disclosure [Line Items]      
Costs and estimated earnings in excess of billings on uncompleted contracts $ 11,300    
Number of major customers | Customer 7    
Project, Approved Scope, Unapproved Price      
Long-term Contracts or Programs Disclosure [Line Items]      
Revenue $ 1,400    
Change orders $ 3,200    
Number of projects | Project 2    
Large Deepwater Project, Recently Delivered      
Long-term Contracts or Programs Disclosure [Line Items]      
Contract losses     $ 24,500