Loans - Summary of loans modified in TDRs and those restructurings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) loan	Dec. 31, 2018 USD ($) loan
Loans
Troubled Debt Restructurings, Number of Loans	3	3
New Troubled Debt Restructurings, Post-Modification Outstanding Balance | $	$ 452	$ 437
New Troubled Debt Restructurings, Number of Loans	1
Troubled Debt Restructurings That Subsequently Defaulted Within 12 Months of The Restructure Date, Number of Loans	0