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Securities (Narrative) (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
USD ($)
security
Sep. 30, 2018
USD ($)
Sep. 30, 2019
USD ($)
security
Sep. 30, 2018
USD ($)
Debt Securities, Available-for-sale [Line Items]        
Proceeds from Sale of Debt Securities, Available-for-sale | $ $ 0 $ 0 $ 259,554 $ 32,330
U.S. Government Agency and Government-Sponsored Enterprise Mortgage-Backed Securities and Collateralized Mortgage Obligations [Member]        
Debt Securities, Available-for-sale [Line Items]        
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 170   170  
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 211   211  
Asset-backed Securities [Member]        
Debt Securities, Available-for-sale [Line Items]        
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 6   6  
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 6   6  
Municipal Bonds [Member]        
Debt Securities, Available-for-sale [Line Items]        
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 27   27  
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 81   81  
U.S. Government and Government-Sponsored Enterprise Securities [Member]        
Debt Securities, Available-for-sale [Line Items]        
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 7   7  
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 7   7  
US Government Securities [Member]        
Debt Securities, Available-for-sale [Line Items]        
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 1   1  
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 1   1