Loans, Impaired Financing Receivables, Impaired Loans (Details) $ in Thousands	Dec. 31, 2020 USD ($)	[1]
Impaired loans with no allocated ACL [Abstract]
Troubled debt restructurings ("TDR")	$ 93
Non - TDR	1,367
Impaired loans with an allocated ACL [Abstract]
TDR - allowance based on collateral	9,027
TDR - allowance based on present value cash flow	37,953
Non - TDR - allowance based on collateral	1,873
Total impaired loans	50,313
Amount of ACL allocated [Abstract]
TDR - allowance based on collateral	1,058
TDR - allowance based on present value cash flow	3,755
Non - TDR - allowance based on collateral	768
Total amount of ACL allocated	$ 5,581

[1] Beginning January 1, 2021, calculation is based on CECL methodology. Prior to January 1, 2021, calculation was based on the probable incurred loss methodology.