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Derivative Instruments (Narrative) (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Interest Rate Swap [Member] |  |  |
Derivative [Line Items] |  |  |
Notional amount | $ 31,580,000 |  | $ 12,039,000
Fair value of yield maintenance provisions | 1,823,000 |  | 12,000
Posted cash collateral | 1,500,000 |  |
Net gains (losses) recognized in earnings | 0 | $ 0 |
Interest Rate Commitments [Member] |  |  |
Derivative [Line Items] |  |  |
Fair value of yield maintenance provisions | 7,308,000 |  | 3,104,000
Notional amount | 399,584,000 |  | 297,454,000
Interest Rate Lock Commitments [Member] |  |  |
Derivative [Line Items] |  |  |
Notional amount | 399,584,000 |  | 297,454,000
Fair value of yield maintenance provisions | $ 7,308,000 |  | 3,104,000
Interest Rate Lock Commitments [Member] | Minimum [Member] |  |  |
Derivative [Line Items] |  |  |
Commitments period | 30 days |  |
Interest Rate Lock Commitments [Member] | Maximum [Member] |  |  |
Derivative [Line Items] |  |  |
Commitments period | 60 days |  |
TBA Mortgage-Back Securities [Member] |  |  |
Derivative [Line Items] |  |  |
Posted cash collateral | $ 936,000 |  |
Notional amount | 242,000,000 |  | 225,500,000
Fair value | (5,132,000) |  | $ (350,000)
CF Bank [Member] |  |  |
Derivative [Line Items] |  |  |
Pledged, collateral derivatives | $ 1,551,000 |  |

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