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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 | 6 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Financial Instrument [Line Items] |  |  |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | $ 1,421 | $ 1,177 | $ 1,622 | $ 773
Mortgage Loans Held for Sale [Member] |  |  |  |
Financial Instrument [Line Items] |  |  |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | 6,682 | (3,312) | (258) | 427
Forward Sales of Mortgage Backed Securities [Member] |  |  |  |
Financial Instrument [Line Items] |  |  |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | (8,329) | 5,417 | 1,017 | (1,163)
Interest Rate Lock Commitments [Member] |  |  |  |
Financial Instrument [Line Items] |  |  |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | 3,128 | (826) | 510 | 1,557
Whole Loan Contracts [Member] |  |  |  |
Financial Instrument [Line Items] |  |  |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | $ (60) | $ (102) | $ 353 | $ (48)

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