PARENT COMPANY - Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest income
Other									$ 1,568	$ 5,333	$ 5,030
Interest expense
Total interest expense									15	19	435
Net interest income	$ 32,520	$ 31,708	$ 32,158	$ 32,220	$ 33,786	$ 34,575	$ 34,299	$ 33,328	128,606	135,988	124,661
Noninterest income
Total noninterest income	3,522	4,023	2,909	4,327	3,717	4,115	7,303	3,493	14,781	18,628	14,252
Noninterest expense
Salaries and employee benefits									55,415	56,222	51,524
Professional and director fees									8,348	7,048	3,537
Data processing and software									5,369	4,435	4,253
Advertising, marketing and business development									1,500	1,831	1,824
Other expenses									5,519	5,831	5,640
Total noninterest expense	23,658	23,858	22,495	22,089	22,110	22,045	23,403	22,585	92,100	90,143	82,016
Income tax benefit	2,283	1,344	539	1,868	2,905	2,990	3,077	2,599	6,034	11,571	11,364
Net income	$ 10,236	$ 6,421	$ 2,163	$ 7,541	$ 12,636	$ 13,076	$ 14,315	$ 10,490	26,361	50,517	47,289
Parent
Interest income
Other										5	187
Interest expense
Note payable									15	15	15
Junior subordinated debt										4	420
Total interest expense									15	19	435
Net interest income									(15)	(14)	(248)
Noninterest income
Dividend income from subsidiary									10,350	8,901	7,800
Total noninterest income									10,350	8,901	7,800
Noninterest expense
Salaries and employee benefits									698	673	755
Professional and director fees									1,107	652	728
Data processing and software									100	13	44
Advertising, marketing and business development									45
Other expenses									206	209	208
Total noninterest expense									2,156	1,547	1,735
Income before income tax benefit and equity in undistributed income of subsidiary									8,179	7,340	5,817
Income tax benefit									(465)	(341)	(437)
Income before equity in undistributed income of subsidiary									8,644	7,681	6,254
Equity in undistributed income of subsidiary									17,717	42,836	41,035
Net income									$ 26,361	$ 50,517	$ 47,289