Quarterly report pursuant to sections 13 or 15(d)

Document And Entity Information

v2.4.0.8
Document And Entity Information
6 Months Ended
Jun. 30, 2013
Jul. 25, 2013
Document Information [Line Items]    
Entity Registrant Name SEACOR HOLDINGS INC /NEW/  
Entity Central Index Key 0000859598  
Current Fiscal Year End Date --12-31  
Entity Filer Category Accelerated Filer  
Document Type 10-Q  
Document Period End Date Jun. 30, 2013  
Document Fiscal Year Focus 2013  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   20,230,727
Entity Well-known Seasoned Issuer Yes  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes