PARENT COMPANY ONLY CONDENSED FINANCIAL INFORMATION - Balance Sheet and Income Statement (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Other assets	$ 32,701	$ 26,645
Total assets	2,318,444	2,266,970
LIABILITIES AND EQUITY
Accrued interest and other liabilities	23,061	10,733
Shareholders’ equity	261,551	244,583	$ 207,345	$ 110,253
Total liabilities and shareholders' equity	2,318,444	2,266,970
Income Statement [Abstract]
Interest income	102,561	88,458	71,782
Interest expense	23,691	19,542	12,152
Income before income taxes	32,057	25,195	22,677
Tax benefit	(5,778)	(4,599)	(8,238)
Net earnings	26,279	20,596	14,439
Comprehensive income	33,648	18,047	14,799
Parent Company
ASSETS
Cash and cash equivalents	7,264	4,111
Investment in banking subsidiaries	268,237	255,637
Other assets	469	384
Total assets	275,970	260,132
LIABILITIES AND EQUITY
Debt	11,563	12,810
Accrued interest and other liabilities	2,856	2,739
Shareholders’ equity	261,551	244,583
Total liabilities and shareholders' equity	275,970	260,132
Income Statement [Abstract]
Interest income	15	13	11
Dividends from Guaranty Bank & Trust	23,000	10,000	0
Income	23,015	10,013	11
Interest expense	653	687	1,024
Other expenses	1,819	2,590	1,682
Expenses	2,472	3,277	2,706
Income before income taxes	20,543	6,736	(2,695)
Tax benefit	639	482	354
Net of Tax	21,182	7,218	(2,341)
Equity in undistributed earnings of subsidiary	5,097	13,378	16,780
Net earnings	26,279	20,596	14,439
Comprehensive income	$ 33,648	$ 18,047	$ 14,799