Quarterly report pursuant to Section 13 or 15(d)

Assets Held for Sale - Narrative (Details)

v3.19.3
Assets Held for Sale - Narrative (Details)
$ in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Oct. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
machine
crane
Sep. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
Jun. 30, 2018
USD ($)
Long Lived Assets Held-for-sale [Line Items]              
Gain on sale of assets held for sale, net       $ 369 $ 3,701    
Recoveries from insurance claims       0 9,362    
Insured event, gain       0 3,342    
Proceeds from sale of property, plant and equipment       1,598 57,716    
Net expense included within asset impairments and (gain) loss on assets held for sale   $ 324 $ 146 254 (5,683)    
Disposal Group, Held-for-sale, Not Discontinued Operations              
Long Lived Assets Held-for-sale [Line Items]              
Assets held for sale   18,518   18,518      
Disposal Group, Held-for-sale, Not Discontinued Operations | Fabrication Division              
Long Lived Assets Held-for-sale [Line Items]              
Assets held for sale   17,918   $ 17,918      
Number of cranes | crane       3      
Number of bending roll machines | machine       2      
Disposal Group, Held-for-sale, Not Discontinued Operations | South Texas Fabrication Yards              
Long Lived Assets Held-for-sale [Line Items]              
Recoveries from insurance claims         9,400 $ 6,000  
Insurance recoveries           3,200  
Insurance settlement             $ 15,400
Insured event, gain         3,600    
Disposal Group, Held-for-sale, Not Discontinued Operations | Texas North Yard              
Long Lived Assets Held-for-sale [Line Items]              
Insurance recoveries           $ 9,000  
Disposal Group, Held-for-sale, Not Discontinued Operations | Shipyard Division              
Long Lived Assets Held-for-sale [Line Items]              
Assets held for sale   600   $ 600      
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Fabrication Division              
Long Lived Assets Held-for-sale [Line Items]              
Assets held for sale   17,900   17,900      
Disposal Group, Disposed of by Sale, Not Discontinued Operations | South Texas Fabrication Yards              
Long Lived Assets Held-for-sale [Line Items]              
Net proceeds from sale of assets         53,800    
Gain on sale of assets held for sale, net     $ 3,900        
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Other              
Long Lived Assets Held-for-sale [Line Items]              
Proceeds from sale of property, plant and equipment       400 1,200    
Asset impairment and (gain) loss on assets held for sale, net       (300) 400    
Impairment of long-lived assets to be disposed of       300 1,400    
Net expense included within asset impairments and (gain) loss on assets held for sale         $ 1,800    
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Shipyard Division              
Long Lived Assets Held-for-sale [Line Items]              
Impairment of long-lived assets to be disposed of   $ 300   $ 300      
Subsequent Event | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Shipyard Division              
Long Lived Assets Held-for-sale [Line Items]              
Proceeds from sale of property, plant and equipment $ 600