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Derivative Instruments (Narrative) (Details) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Derivative [Line Items]      
Notional amount $ 676,000   $ 1,359,000
Interest Rate Swap [Member]      
Derivative [Line Items]      
Notional amount 676,000   1,359,000
Net gains (losses) recognized in earnings 0 $ 0  
Interest Rate Lock Commitments [Member]      
Derivative [Line Items]      
Notional amount 122,198,000   55,220,000
Fair value of yield maintenance provisions 1,325,000   $ 721,000
CF Bank [Member]      
Derivative [Line Items]      
Securities pledged as collateral $ 98,000