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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 | 9 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Financial Instrument [Line Items] |  |  |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | $ 782 | $ (541) | $ 2,404 | $ 232
Mortgage Loans Held for Sale [Member] |  |  |  |
Financial Instrument [Line Items] |  |  |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | (1,704) | (1,338) | (1,962) | (911)
Forward Sales of Mortgage Backed Securities [Member] |  |  |  |
Financial Instrument [Line Items] |  |  |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | 3,877 | 1,670 | 4,893 | 507
Interest Rate Lock Commitments [Member] |  |  |  |
Financial Instrument [Line Items] |  |  |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | (1,440) | (853) | (940) | 704
Whole Loan Contracts [Member] |  |  |  |
Financial Instrument [Line Items] |  |  |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | $ 49 | $ (20) | $ 413 | $ (68)

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