EARNINGS PER SHARE - Schedule of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Numerator:
Net earnings attributable to Guaranty Bancshares, Inc.	$ 8,281	$ 10,738
Denominator:
Weighted-average shares outstanding (basic) (in shares)	11,939,593	12,109,074
Effect of dilutive securities:
Common stock equivalent shares from stock options (in shares)	72,411	151,871
Weighted-average shares outstanding (diluted) (in shares)	12,012,004	12,260,945
Net earnings attributable to Guaranty Bancshares, Inc. per share
Basic (in USD per share)	$ 0.69	$ 0.89
Diluted (in USD per share)	$ 0.69	$ 0.88