Current Accounting Developments - Schedule of Impact of ASC 326 on Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for loan losses	$ 5,220	$ 3,496		$ 2,240	$ 2,096	$ 1,916	$ 1,680
ASU 2016-13
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for loan losses			$ 2,377
ASU 2016-13 | Impact of ASC 326 Adoption
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for loan losses			137
Commercial - Purchase
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for loan losses	524	352		304
Commercial - Purchase | ASU 2016-13
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for loan losses			323
Commercial - Purchase | ASU 2016-13 | Impact of ASC 326 Adoption
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for loan losses			19
Commercial - Refinance
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for loan losses	2,687	1,594		1,016
Commercial - Refinance | ASU 2016-13
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for loan losses			1,078
Commercial - Refinance | ASU 2016-13 | Impact of ASC 326 Adoption
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for loan losses			62
Residential 1-4 Unit - Purchase
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for loan losses	403	250		148
Residential 1-4 Unit - Purchase | ASU 2016-13
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for loan losses			157
Residential 1-4 Unit - Purchase | ASU 2016-13 | Impact of ASC 326 Adoption
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for loan losses			9
Residential 1-4 Unit - Refinance
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for loan losses	$ 1,606	$ 1,300		$ 772
Residential 1-4 Unit - Refinance | ASU 2016-13
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for loan losses			819
Residential 1-4 Unit - Refinance | ASU 2016-13 | Impact of ASC 326 Adoption
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Allowance for loan losses			$ 47