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Fair Value Measurements (Loss) Gain On Assets and Liabilities Measured On A Recurring Basis (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Financial Instrument [Line Items] |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | $ 543 | $ 995
Mortgage Loans Held for Sale [Member] |  |
Financial Instrument [Line Items] |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | (1,363) | 675
Forward Sales of Mortgage Backed Securities [Member] |  |
Financial Instrument [Line Items] |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | 1,934 | (302)
Interest Rate Lock Commitments [Member] |  |
Financial Instrument [Line Items] |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | (42) | 705
Whole Loan Contracts [Member] |  |
Financial Instrument [Line Items] |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | $ 14 | $ (83)

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