Document And Entity Information
6 Months Ended
Jun. 30, 2011
Jul. 27, 2011
Document and Entity Information    
Entity Registrant Name ST JOE CO  
Entity Central Index Key 0000745308  
Document Type 10-Q  
Document Period End Date Jun. 30, 2011  
Amendment Flag false  
Document Fiscal Year Focus 2011  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   122,773,187