Quarterly Results of Operations (Unaudited) (Details) - USD ($) $ / shares in Units, $ 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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Quarterly Financial Data [Abstract]
Total interest income	$ 20,579	$ 19,794	$ 19,004	$ 17,339	$ 18,062	$ 17,837	$ 17,306	$ 16,878	$ 17,207	$ 16,580	$ 15,595	$ 14,795	$ 76,716	$ 70,083	$ 64,177
Total interest expense	1,355	1,500	1,547	1,649	1,652	1,531	1,349	1,109	1,070	761	606	532	6,051	5,641	2,969
Net Interest Income	19,224	18,294	17,457	15,690	16,410	16,306	15,957	15,769	16,137	15,819	14,989	14,263	70,665	64,442	61,208
(Benefit) provision for loan losses	(599)	567	404	2,060	(150)	(2,075)	300	750	(200)	0	(300)	0	2,432	(1,175)	(500)
Other operating income	17,732	21,628	17,535	6,433	9,735	10,509	9,569	7,533	7,718	8,673	8,314	7,462	63,328	37,346	32,167
Compensation expense - RML acquisition payments					468	0	0	0					0	468	0
Other operating expense	24,147	23,506	22,674	18,787	20,147	19,324	19,819	17,080	18,300	18,099	16,606	16,795	89,114	76,370	69,800
Income Before Provision for Income Taxes	13,408	15,849	11,914	1,276	5,680	9,566	5,407	5,472	5,755	6,393	6,997	4,930	42,447	26,125	24,075
Provision for income taxes	3,308	3,994	2,014	243	1,100	2,028	1,146	1,160	907	1,129	1,167	868	9,559	5,434	4,071
Net Income	$ 10,100	$ 11,855	$ 9,900	$ 1,033	$ 4,580	$ 7,538	$ 4,261	$ 4,312	$ 4,848	$ 5,264	$ 5,830	$ 4,062	$ 32,888	$ 20,691	$ 20,004
Earnings per share, Basic (in USD per share)	$ 1.62	$ 1.87	$ 1.54	$ 0.16	$ 0.70	$ 1.13	$ 0.62	$ 0.63	$ 0.70	$ 0.77	$ 0.85	$ 0.59	$ 5.18	$ 3.08	$ 2.91
Earnings per share, Diluted (in USD per share)	$ 1.59	$ 1.84	$ 1.52	$ 0.16	$ 0.69	$ 1.11	$ 0.62	$ 0.62	$ 0.69	$ 0.75	$ 0.84	$ 0.58	$ 5.11	$ 3.04	$ 2.86