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Derivative Instruments (Details) - Not designated as hedging - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Derivative Instruments |  |
Fair Value, Derivative Assets | $ 2,483 | $ 12
Fair Value, Derivative Liabilities | 104 | 7
Notional Amount, Derivative Assets | 107,270 | 33,858
Notional Amount, Derivative Liabilities | 148,500 | 2,956
Interest rate lock commitments | Other assets. |  |
Derivative Instruments |  |
Fair Value, Derivative Assets | 2,036 | 12
Notional Amount, Derivative Assets | 89,608 | 33,858
Forward loan sales commitments | Other assets. |  |
Derivative Instruments |  |
Fair Value, Derivative Assets | 447 |
Notional Amount, Derivative Assets | 17,662 |
Forward loan sales commitments | Accrued expenses and other liabilities |  |
Derivative Instruments |  |
Fair Value, Derivative Liabilities |  | 7
Notional Amount, Derivative Liabilities |  | $ 2,956
TBA mortgage backed securities | Accrued expenses and other liabilities |  |
Derivative Instruments |  |
Fair Value, Derivative Liabilities | 104 |
Notional Amount, Derivative Liabilities | $ 148,500 |

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