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Derivative Instruments and Hedging Activities (Effect of Derivative Instruments on the Income Statement) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Derivative Instruments Gain Loss [Line Items]    
Income from derivative instruments, net $ 972 $ 131
Derivatives Not Designated as Hedging Instruments [Member]    
Derivative Instruments Gain Loss [Line Items]    
Income from derivative instruments, net 972 131
Interest Rate Swap [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Net Gain on Derivative Instruments [Member]    
Derivative Instruments Gain Loss [Line Items]    
Income from derivative instruments, net 759  
Credit Contract [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Net Gain on Derivative Instruments [Member]    
Derivative Instruments Gain Loss [Line Items]    
Income from derivative instruments, net 184 $ 131
Mortgage Banking [Member] | Derivatives Not Designated as Hedging Instruments [Member] | Net Gain on Derivative Instruments [Member]    
Derivative Instruments Gain Loss [Line Items]    
Income from derivative instruments, net $ 29