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Fair Value Measurements (Loss) Gain On Assets and Liabilities Measured On A Recurring Basis (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Financial Instrument [Line Items]      
(Loss) Gain On Assets and Liabilities Measured On A Recurring Basis $ 511 $ 833 $ 3,745
Mortgage Loans Held for Sale [Member]      
Financial Instrument [Line Items]      
(Loss) Gain On Assets and Liabilities Measured On A Recurring Basis (2,261) 3,763 3,675
Forward Sales or Mortgage Backed Securities [Member]      
Financial Instrument [Line Items]      
(Loss) Gain On Assets and Liabilities Measured On A Recurring Basis 2,969 (3,482) (53)
Interest Rate Lock Commitments [Member]      
Financial Instrument [Line Items]      
(Loss) Gain On Assets and Liabilities Measured On A Recurring Basis (370) 783 21
Best Efforts Contracts [Member]      
Financial Instrument [Line Items]      
(Loss) Gain On Assets and Liabilities Measured On A Recurring Basis $ 173 $ (231) $ 102