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Acquisitions (Details) - USD ($)
$ in Thousands
 9 Months Ended
Apr. 13, 2015
Sep. 30, 2015
Business Acquisition [Line Items]    
Total consideration   $ 11,374
Accounts receivable   10,662
Costs and estimated earnings in excess of billings on uncompleted contracts   2,102
Other current assets   59
Property and equipment   2,030
Intangible assets   0
Accounts payable   (3,621)
Billings in excess of costs and estimated earnings on uncompleted contracts   (1,490)
Other current liabilities   (437)
Net identifiable assets   9,305
Goodwill   $ 2,069
Scenario, Previously Reported [Member]    
Business Acquisition [Line Items]    
Total consideration $ 11,374  
Accounts receivable 10,662  
Costs and estimated earnings in excess of billings on uncompleted contracts 2,102  
Other current assets 59  
Property and equipment 1,778  
Accounts payable (3,621)  
Billings in excess of costs and estimated earnings on uncompleted contracts (1,490)  
Other current liabilities (437)  
Net identifiable assets 9,053  
Goodwill 2,321  
Restatement Adjustment [Member]    
Business Acquisition [Line Items]    
Total consideration 0  
Accounts receivable 0  
Costs and estimated earnings in excess of billings on uncompleted contracts 0  
Other current assets 0  
Property and equipment 252  
Intangible assets 0  
Accounts payable 0  
Billings in excess of costs and estimated earnings on uncompleted contracts 0  
Other current liabilities 0  
Net identifiable assets 252  
Goodwill $ (252)