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DOCUMENT AND ENTITY INFORMATION - shares
3 Months Ended
Mar. 31, 2019
May 03, 2019
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Trading Symbol GNTY  
Entity Registrant Name GUARANTY BANCSHARES INC /TX/  
Entity Central Index Key 0001058867  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company true  
Entity Ex Transition Period true  
Entity Common Stock, Shares Outstanding   11,705,079