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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
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Financial Instrument [Line Items]        
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis $ 253 $ 61 $ 796 $ 1,056
Mortgage Loans Held for Sale [Member]        
Financial Instrument [Line Items]        
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis 346 642 (1,017) 1,317
Forward Sales of Mortgage Backed Securities [Member]        
Financial Instrument [Line Items]        
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis (602) (658) 1,332 (960)
Interest Rate Lock Commitments [Member]        
Financial Instrument [Line Items]        
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis 470 138 428 843
Whole Loan Contracts [Member]        
Financial Instrument [Line Items]        
Gain (Loss) On Assets and Liabilities Measured On A Recurring Basis $ 39 $ (61) $ 53 $ (144)