Investment Securities (Narrative) (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Schedule of Investments [Line Items]
Available-for-sale Securities Pledged as Collateral	$ 142,407,000		$ 147,283,000
Debt Securities, Available-for-sale, Restriction Type [Extensible List]	us-gaap:CollateralPledgedMember		us-gaap:CollateralPledgedMember
FHLB [Member]
Schedule of Investments [Line Items]
Letter of credit outstanding, amount	$ 169,636,000	$ 169,051,000	$ 169,051,000