Quarterly report pursuant to Section 13 or 15(d)

Long Term Debt - Schedule of Long-term Debt Obligations (Details)

v3.19.1
Long Term Debt - Schedule of Long-term Debt Obligations (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Long-term Debt, Gross $ 438,375 $ 442,972
Portion due within one year (17,426) (16,812)
Debt discount (30,631) (32,005)
Issue costs (5,974) (6,301)
Long-term debt 384,344 387,854
SEACOR Marine Foreign Holdings Syndicated Credit Facility    
Debt Instrument [Line Items]    
Long-term Debt, Gross 123,500 126,750
Convertible Senior Notes    
Debt Instrument [Line Items]    
Long-term Debt, Gross 125,000 125,000
Falcon Global USA Term Loan Facility    
Debt Instrument [Line Items]    
Long-term Debt, Gross 109,099 109,099
Sea-Cat Crewzer III Term Loan Facility    
Debt Instrument [Line Items]    
Long-term Debt, Gross 25,366 25,989
Windcat Workboats Facilities    
Debt Instrument [Line Items]    
Long-term Debt, Gross 24,615 24,850
Falcon Global USA Revolver    
Debt Instrument [Line Items]    
Long-term Debt, Gross 15,000 15,000
SEACOR 88/888 Term Loan    
Debt Instrument [Line Items]    
Long-term Debt, Gross 11,000 11,000
BNDES Equipment Construction Finance Notes    
Debt Instrument [Line Items]    
Long-term Debt, Gross $ 4,795 $ 5,284