PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION - Balance Sheet and Income Statement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
ASSETS
Other assets	$ 34,848	$ 32,701
Total assets	2,740,832	2,318,444
LIABILITIES AND EQUITY
Accrued interest and other liabilities	25,257	23,061
Shareholders’ equity	272,643	261,551	$ 244,583	$ 207,345
Total liabilities and shareholders' equity	2,740,832	2,318,444
Income Statement [Abstract]
Interest income	103,042	102,561	88,458
Interest expense	13,060	23,691	19,542
Income before income taxes	33,297	32,057	25,195
Tax effect	(5,895)	(5,778)	(4,599)
Net earnings	27,402	26,279	20,596
Comprehensive income	38,824	33,648	18,047
Parent Company
ASSETS
Cash and cash equivalents	1,227	7,264
Investment in banking subsidiaries	305,926	268,237
Other assets	451	469
Total assets	307,604	275,970
LIABILITIES AND EQUITY
Debt	31,810	11,563
Accrued interest and other liabilities	3,151	2,856
Shareholders’ equity	272,643	261,551
Total liabilities and shareholders' equity	307,604	275,970
Income Statement [Abstract]
Interest income	10	15	13
Dividends from Guaranty Bank & Trust	0	23,000	10,000
Income	10	23,015	10,013
Interest expense	939	653	687
Other expenses	2,000	1,819	2,590
Expenses	2,939	2,472	3,277
Income before income taxes	(2,929)	20,543	6,736
Tax effect	574	639	482
Net of Tax	(2,355)	21,182	7,218
Equity in undistributed earnings of subsidiary	29,757	5,097	13,378
Net earnings	27,402	26,279	20,596
Comprehensive income	$ 38,824	$ 33,648	$ 18,047