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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, 2017 | Mar. 31, 2016
Financial Instrument [Line Items] |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | $ 4,571 | $ 1,232
Mortgage Loans Held for Sale [Member] |  |
Financial Instrument [Line Items] |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | 4,874 | 1,360
Forward Sales of Mortgage Backed Securities [Member] |  |
Financial Instrument [Line Items] |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | (911) | (766)
Interest Rate Lock Commitments [Member] |  |
Financial Instrument [Line Items] |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | 842 | 569
Best Efforts Contracts [Member] |  |
Financial Instrument [Line Items] |  |
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis | $ (234) | $ 69

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