Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Narrative) (Details)

v2.4.0.8
Long-Term Debt (Narrative) (Details) (USD $)
6 Months Ended 0 Months Ended 1 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
SEACOR Revolving Credit Facility [Member]
Dec. 07, 2012
7.750%Senior Notes [Member]
Jul. 31, 2013
Subsequent Event [Member]
SEACOR Revolving Credit Facility [Member]
Debt Instrument [Line Items]          
Face amount       $ 200,000,000.0  
Stated interest rate       7.75%  
Proceeds from issuance of long-term debt 15,000,000 38,000,000   191,900,000  
Line of credit outstanding     50,000,000    
Remaining borrowing capacity     149,300,000   164,300,000
Letters of credit outstanding     700,000    
Borrowing from lines of credit     15,000,000    
Repayments of lines of credit     (15,000,000)   (15,000,000)
Payments on other long-term debt $ 1,400,000