Quarterly report pursuant to Section 13 or 15(d)

Assets Held for Sale - Narrative (Details)

v3.19.2
Assets Held for Sale - Narrative (Details)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2019
USD ($)
machine
crane
Jun. 30, 2018
USD ($)
Dec. 31, 2017
USD ($)
Long Lived Assets Held-for-sale [Line Items]          
Gain on sale of assets held for sale, net     $ 369 $ 3,853  
Recoveries from insurance claims     0 2,165  
Insured event, gain     0 3,342  
Proceeds from sale of property, plant and equipment     1,598 56,446  
Impairment of Long-Lived Assets to be Disposed of   $ 600      
Asset impairment and (gain) loss on assets held for sale, net     (100) 1,400  
Disposal Group, Held-for-sale, Not Discontinued Operations          
Long Lived Assets Held-for-sale [Line Items]          
Assets held for sale     18,737    
Disposal Group, Held-for-sale, Not Discontinued Operations | Fabrication Division          
Long Lived Assets Held-for-sale [Line Items]          
Assets held for sale     $ 17,813    
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 $ 7,200     2,200 $ 6,000
Insurance recoveries   9,000     $ 3,200
Insurance settlement   15,400   15,400  
Insured event, gain   3,600      
Disposal Group, Held-for-sale, Not Discontinued Operations | Shipyard Division          
Long Lived Assets Held-for-sale [Line Items]          
Assets held for sale     $ 924    
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Fabrication Division          
Long Lived Assets Held-for-sale [Line Items]          
Assets held for sale     17,800    
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   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 $ 200