Quarterly report pursuant to Section 13 or 15(d)

Noncontrolling Interests in Subsidiaries - Additional Information (Details)

v3.19.1
Noncontrolling Interests in Subsidiaries - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 15, 2019
Jan. 25, 2019
Minority Interest [Line Items]        
Net income (loss), including portion attributable to noncontrolling interest, total $ (28,273) $ (31,688)    
Net income (loss) attributable to noncontrolling interest, total (2,724) (2,855)    
Windcat Workboats Facilities        
Minority Interest [Line Items]        
Net income (loss), including portion attributable to noncontrolling interest, total   1,900    
Net income (loss) attributable to noncontrolling interest, total   200    
Falcon Global Holdings        
Minority Interest [Line Items]        
Net income (loss), including portion attributable to noncontrolling interest, total 9,700 9,300    
Net income (loss) attributable to noncontrolling interest, total $ 2,700 $ 2,600    
Noncontrolling interest, ownership percentage by parent 72.00%      
Windcat Workboats        
Minority Interest [Line Items]        
Noncontrolling interest, ownership percentage by parent       87.00%
Windcat Workboats | Seabulk Overseas        
Minority Interest [Line Items]        
Business acquisition, percentage of voting interests acquired     6.25% 6.25%