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Investment Securities (Narrative) (Details) - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Schedule of Investments [Line Items]    
Available-for-sale Securities Pledged as Collateral $ 128,301,000 $ 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 $ 212,401,000 $ 169,051,000