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Estimated Fair Values (Narrative) (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Dec. 31, 2018 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 | $ 0 | $ 0 |  |  |
Gains (Losses) from fair value changes on originated loans held for sale | 583 | $ (773) | $ 750 | $ (528) |
Fair Value, Measurements, Nonrecurring |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Liability measured at fair value on nonrecurring basis | $ 0 |  | $ 0 |  | $ 0
Corporate bonds |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 |  |  |  | $ 65,300 |
Discount Rate | Minimum |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Loans held-for-sale, measurement input | 0.06 |  | 0.06 |  |
OREO, measurement input | 0.06 |  | 0.06 |  |
Discount Rate | Maximum |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Loans held-for-sale, measurement input | 0.11 |  | 0.11 |  |
OREO, measurement input | 0.11 |  | 0.11 |  |
Effective Interest Rate | Minimum |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Loans held-for-sale, measurement input | 0.03 |  | 0.03 |  |
Effective Interest Rate | Maximum |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Loans held-for-sale, measurement input | 0.07 |  | 0.07 |  |

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