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Derivative Instruments (Narrative) (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Derivative [Line Items] |  |  |
Notional amount | $ 57,882,000 |  | $ 46,474,000
Fair value, Derivative assets | 998,000 |  | 1,944,000
Fair value, Derivative liabilities | (998,000) |  | (1,944,000)
Interest Rate Swap [Member] |  |  |
Derivative [Line Items] |  |  |
Notional amount | 57,882,000 |  | 46,474,000
Net gains (losses) recognized in earnings | 0 | $ 0 |
Interest Rate Lock Commitments [Member] |  |  |
Derivative [Line Items] |  |  |
Fair value, Derivative assets |  |  | 18,100,000
Notional amount | 745,616,000 |  | 1,048,613,000
Fair value, Derivative liabilities | $ (613,000) |  |
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] |  |  |
Fair value, Derivative assets | $ 5,734,000 |  |
Posted cash collateral | 4,847,000 |  |
Notional amount | 552,750,000 |  | 506,750,000
Fair value, Derivative liabilities |  |  | $ (2,690,000)
CF Bank [Member] |  |  |
Derivative [Line Items] |  |  |
Pledged, collateral derivatives | $ 2,723,000 |  |

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