Loans and Allowance for Loan Losses - Activity in the Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2018	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 12,648	$ 9,691		$ 9,867	$ 9,558
Charge-offs	(114)	(209)		(275)	(538)
Recoveries	46	93		188	180
Provision	1,200	175		4,000	550
Ending balance	13,780	9,750		13,780	9,750
Individually Evaluated for Impairment	2,855	803		2,855	803	$ 884
Collectively Evaluated for Potential Impairment	10,925	8,947		10,925	8,947	8,983
Real Estate | Residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	2,688	1,096		2,023	1,050
Charge-offs	(11)	(28)		(36)	(71)
Recoveries	1	1		5	10
Provision	(506)	582		180	662
Ending balance	2,172	1,651		2,172	1,651
Individually Evaluated for Impairment	0	0		0	0	0
Collectively Evaluated for Potential Impairment	2,172	1,651		2,172	1,651	2,023
Real Estate | Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	5,160	3,446		3,210	2,693
Charge-offs	0	0		0	0
Recoveries	1	35		28	56
Provision	1,711	(508)		3,634	224
Ending balance	6,872	2,973		6,872	2,973
Individually Evaluated for Impairment	2,248	300		2,248	300	274
Collectively Evaluated for Potential Impairment	4,624	2,673		4,624	2,673	2,936
Real Estate | Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	820	488		285	395
Charge-offs	0	0		0	0
Recoveries	0	0		0	0
Provision	71	49		606	142
Ending balance	891	537		891	537
Individually Evaluated for Impairment	0	0		0	0	0
Collectively Evaluated for Potential Impairment	891	537		891	537	285
Commercial and Industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,566	2,718		2,412	2,807
Charge-offs	0	(16)	$ (1,400)	0	(16)
Recoveries	6	5		21	7
Provision	170	(278)		(691)	(369)
Ending balance	1,742	2,429		1,742	2,429
Individually Evaluated for Impairment	607	503		607	503	610
Collectively Evaluated for Potential Impairment	1,135	1,926		1,135	1,926	1,802
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,714	1,500		1,417	2,027
Charge-offs	(103)	(165)		(239)	(451)
Recoveries	38	52		134	107
Provision	(290)	76		47	(220)
Ending balance	1,359	1,463		1,359	1,463
Individually Evaluated for Impairment	0	0		0	0	0
Collectively Evaluated for Potential Impairment	1,359	1,463		1,359	1,463	1,417
Other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	0	0		0	0
Charge-offs	0	0		0	0
Recoveries	0	0		0	0
Provision	0	0		0	0
Ending balance	0	0		0	0
Individually Evaluated for Impairment	0	0		0	0	0
Collectively Evaluated for Potential Impairment	0	0		0	0	0
Unallocated
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	700	443		520	586
Charge-offs	0	0		0	0
Recoveries	0	0		0	0
Provision	44	254		224	111
Ending balance	744	697		744	697
Individually Evaluated for Impairment	0	0		0	0	0
Collectively Evaluated for Potential Impairment	$ 744	$ 697		$ 744	$ 697	$ 520