Loans - Summary of impaired loans by segment (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Schedule of Impaired Financing Receivable [Table]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	$ 893	$ 1,096
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,320	1,320	$ 1,476
Unpaid Principal Balance	1,320	1,320	1,476	$ 0
Average Recorded Investment	893	1,096
Non-performing loans	1,322	1,322	1,476
Consumer
Schedule of Impaired Financing Receivable [Table]
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	893	1,096
Financing Receivable, Impaired [Line Items]
Average Recorded Investment	893	1,096
Non-performing loans	1,300	1,300	1,500
Commercial
Financing Receivable, Impaired [Line Items]
Non-performing loans	2	2
Consumer
Financing Receivable, Impaired [Line Items]
Recorded Investment	1,320	1,320	1,476
Unpaid Principal Balance	1,320	1,320	1,476
Non-performing loans	$ 1,320	$ 1,320	$ 1,476