PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION - Balance Sheet and Income Statement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Other assets	$ 61,385	$ 45,806
Total assets	3,351,495	3,086,070
LIABILITIES AND EQUITY
Subordinated debt, net	49,153	19,810
Accrued expenses and other liabilities	28,409	26,568
Shareholders equity	294,984	302,214
Total liabilities and equity	3,351,495	3,086,070
Income Statement [Abstract]
Interest income	123,209	102,550	$ 103,042
Interest expense	15,380	6,992	13,060
Income before income taxes	49,257	48,556	33,297
Income tax benefit	(8,834)	(8,750)	(5,895)
Net earnings	40,423	39,806	27,402
Equity in undistributed earnings of subsidiary	24	0	0
Net earnings attributable to Guaranty Bancshares, Inc.	40,447	39,806	27,402
Comprehensive income	9,882	36,482	38,824
Parent Company
ASSETS
Cash and cash equivalents	6,848	2,709
Investment in banking subsidiary	339,168	326,489
Other assets	1,351	627
Total assets	347,367	329,825
LIABILITIES AND EQUITY
Line of credit	0	5,000
Subordinated debt, net	49,153	19,810
Accrued expenses and other liabilities	3,230	2,801
Shareholders equity	294,984	302,214
Total liabilities and equity	347,367	329,825
Income Statement [Abstract]
Interest income	8	7	10
Dividends from Guaranty Bank & Trust	0	18,000	0
Income	8	18,007	10
Interest expense	1,755	916	939
Other expenses	1,974	2,520	2,000
Expenses	3,729	3,436	2,939
Income before income taxes	(3,721)	14,571	(2,929)
Income tax benefit	924	718	574
Net earnings	(2,797)	15,289	(2,355)
Equity in undistributed earnings of subsidiary	43,244	24,517	29,757
Net earnings attributable to Guaranty Bancshares, Inc.	40,447	39,806	27,402
Comprehensive income	$ 9,882	$ 36,482	$ 38,824