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Fair Value Measurements (Loss) Gain On Assets and Liabilities Measured On A Recurring Basis (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Financial Instrument [Line Items] |  |  |
(Loss) Gain On Assets and Liabilities Measured On A Recurring Basis | $ 833 | $ 3,745 | $ (3,223)
Mortgage Loans Held for Sale [Member] |  |  |
Financial Instrument [Line Items] |  |  |
(Loss) Gain On Assets and Liabilities Measured On A Recurring Basis | 3,763 | 3,675 | (3,591)
Forward Sales or Mortgage Backed Securities [Member] |  |  |
Financial Instrument [Line Items] |  |  |
(Loss) Gain On Assets and Liabilities Measured On A Recurring Basis | (3,482) | (53) | 323
Interest Rate Lock Commitments [Member] |  |  |
Financial Instrument [Line Items] |  |  |
(Loss) Gain On Assets and Liabilities Measured On A Recurring Basis | 783 | 21 | (71)
Best Efforts Contracts [Member] |  |  |
Financial Instrument [Line Items] |  |  |
(Loss) Gain On Assets and Liabilities Measured On A Recurring Basis | $ (231) | $ 102 | $ 116

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