XML 13 R1.htm IDEA: XBRL DOCUMENT v3.19.2
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2019
Jul. 25, 2019
Document and Entity Information [Abstract]    
Entity Registrant Name SOUTHERN FIRST BANCSHARES INC  
Entity Central Index Key 0001090009  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Type 10-Q  
Document Period End Date Jun. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Entity Filer Category Accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Ex Transition Period false  
Entity Common Stock, Shares Outstanding   7,557,923
Entity Shell Company false  
Entity Interactive Data Current Yes  
Entity Current Reporting Status Yes