XML 146 R1.htm IDEA: XBRL DOCUMENT v2.4.0.8
Document and Entity Information
6 Months Ended
Jun. 30, 2013
Jul. 31, 2013
Entity Information [Line Items]    
Entity Registrant Name SOUTHSIDE BANCSHARES INC  
Entity Central Index Key 0000705432  
Current Fiscal Year End Date --12-31  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding   17,866,716
Document Fiscal Year Focus 2013  
Document Fiscal Period Focus Q2  
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2013