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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, 2020 | Mar. 31, 2019
Financial Instrument [Line Items] |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | $ (404) | $ 543
Mortgage Loans Held for Sale [Member] |  |
Financial Instrument [Line Items] |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | 3,739 | (1,363)
Forward Sales of Mortgage Backed Securities [Member] |  |
Financial Instrument [Line Items] |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | (6,580) | 1,934
Interest Rate Lock Commitments [Member] |  |
Financial Instrument [Line Items] |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | 2,383 | (42)
Whole Loan Contracts [Member] |  |
Financial Instrument [Line Items] |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | $ 54 | $ 14

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