UNAUDITED QUARTERLY FINANCIAL DATA (Selected Consolidated Quarterly Financial Data) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Information (Unaudited)
Interest income	$ 36,466	$ 35,496	$ 30,828	$ 26,990	$ 23,342	$ 21,907	$ 19,998	$ 18,693	$ 129,780	$ 83,945
Interest expense	8,424	9,443	7,891	6,412	4,381	3,556	2,603	2,177	32,170	12,717
Net interest income	28,042	26,053	22,937	20,578	18,961	18,351	17,395	16,516	97,610	71,228
Provision for loan losses	2,300	2,004	1,950	(2,031)	844	(453)	1,270	1,477	4,223	3,138
Net interest income after provision for loan losses	25,742	24,049	20,987	22,609	18,117	18,804	16,125	15,039	93,387	68,090
Non-interest income	2,862	2,700	2,674	2,393	2,188	2,012	2,649	5,312
Non-interest expense	17,042	15,495	14,724	12,694	11,602	10,355	10,275	11,238	59,955	43,471
Income before income taxes	11,562	11,254	8,937	12,308	8,703	10,461	8,499	9,113	44,061	36,775
Income tax expense	3,699	3,571	2,880	3,777	2,418	3,348	2,634	2,822	13,927	11,221
Net income	$ 7,863	$ 7,683	$ 6,057	$ 8,531	$ 6,285	$ 7,113	$ 5,865	$ 6,291	$ 30,134	$ 25,554
Basic earnings per common share (in dollars per share)	$ 0.95	$ 0.92	$ 0.73	$ 1.03	$ 0.77	$ 0.87	$ 0.72	$ 0.77	$ 3.63	$ 3.12
Diluted earnings per common share (in dollars per share)	$ 0.93	$ 0.90	$ 0.71	$ 1.01	$ 0.75	$ 0.85	$ 0.70	$ 0.75	$ 3.56	$ 3.06