v3.19.3
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2019
Nov. 13, 2019
Cover [Abstract]    
Entity Registrant Name SOUTH PLAINS FINANCIAL, INC.  
Entity Central Index Key 0001163668  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Shell Company false  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Common Stock, Shares Outstanding   18,007,041
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Entity Address, State or Province TX