Loans - Schedule of Activity in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	$ 12,764	$ 9,525	$ 10,050	$ 9,636
Provision for loan losses	1,399	290	4,130	691
Charge-offs		(175)	(45)	(688)
Recoveries	1		29	1
Ending balance	14,164	9,640	14,164	9,640
Commercial Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	7,145	5,554	6,000	4,805
Provision for loan losses	994	102	2,139	851
Ending balance	8,139	5,656	8,139	5,656
SBA Loans-Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	1,346	933	939	894
Provision for loan losses	412		819	59
Charge-offs				(20)
Ending balance	1,758	933	1,758	933
SBA Loans—Non-Real Estate
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	253	119	121	505
Provision for loan losses	18	(2)	167	(388)
Charge-offs			(45)
Recoveries			28
Ending balance	271	117	271	117
Commercial and Industrial
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	1,920	1,266	1,289	1,746
Provision for loan losses	(5)	171	626	184
Charge-offs		(175)		(668)
Ending balance	1,915	1,262	1,915	1,262
Home Mortgage
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	2,074	1,609	1,667	1,653
Provision for loan losses	(15)	26	392	(18)
Ending balance	2,059	1,635	2,059	1,635
Consumer
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance	26	44	34	33
Provision for loan losses	(5)	(7)	(13)	3
Recoveries	1		1	1
Ending balance	$ 22	$ 37	$ 22	$ 37