v3.26.3
Investments, at Equity, and Advances to 50% or Less Owned Companies - Schedule of Equity Investments (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Sep. 30, 2025
Schedule Of Investments [Line Items]      
Investments at equity $ 956 $ 2,938 $ 2,700
Seabulk Angola      
Schedule Of Investments [Line Items]      
Ownership percentage 49.00%    
Investments at equity $ 446 1,058  
SEACOR Marine Arabia      
Schedule Of Investments [Line Items]      
Ownership percentage 45.00%    
Investments at equity $ 441 1,809  
Other Offshore Marine Services Joint Ventures      
Schedule Of Investments [Line Items]      
Investments at equity $ 69 $ 71  
Other Offshore Marine Services Joint Ventures | Minimum      
Schedule Of Investments [Line Items]      
Ownership percentage 20.00%    
Other Offshore Marine Services Joint Ventures | Maximum      
Schedule Of Investments [Line Items]      
Ownership percentage 50.00%