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Securities (Narrative) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
issuance
security
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Debt Securities, Available-for-sale [Line Items]      
Number Of Issuances Of Securities Exceeding Shareholders Equity Threshold | issuance 0    
Proceeds from Sale of Debt Securities, Available-for-sale | $ $ 259,554 $ 32,330 $ 30,403
US Government Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 0    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year 0    
Other Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Issuances Of Securities Exceeding Shareholders Equity Threshold, Percent 10.00%    
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 243    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year 162    
Municipal Bonds [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 24    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year 14    
US Government Corporations and Agencies Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions 3    
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year 3