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Securities (Schedule of Amortized Cost Gross Unrealized Gains and Losses, and Fair Values of Securities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Jun. 30, 2018
Schedule of Investments [Line Items]      
Available for Sale, Gross Unrealized Gains $ 0 $ 0  
Available for Sale, Gross Unrealized Losses 0 0  
Available for Sale, Fair Value 238,083 243,277  
Pledged Financial Instruments, Not Separately Reported, Securities 196,986   $ 219,244
Total Debt Securities [Member]      
Schedule of Investments [Line Items]      
Available for Sale, Amortized Cost 238,205 250,311  
Available for Sale, Gross Unrealized Gains 1,495 410  
Available for Sale, Gross Unrealized Losses (1,617) (7,444)  
Available for Sale, Fair Value 238,083 243,277  
States and Political Subdivisions [Member]      
Schedule of Investments [Line Items]      
Available for Sale, Amortized Cost 92,821 99,218  
Available for Sale, Gross Unrealized Gains 1,186 385  
Available for Sale, Gross Unrealized Losses (72) (1,990)  
Available for Sale, Fair Value 93,935 97,613  
Corporate Obligations [Member]      
Schedule of Investments [Line Items]      
Available for Sale, Amortized Cost 8,812 8,896  
Available for Sale, Gross Unrealized Gains 17 0  
Available for Sale, Gross Unrealized Losses (24) (256)  
Available for Sale, Fair Value 8,805 8,640  
Mortgage-backed Securities-Government Sponsored Entities [Member]      
Schedule of Investments [Line Items]      
Available for Sale, Amortized Cost 136,572 142,197  
Available for Sale, Gross Unrealized Gains 292 25  
Available for Sale, Gross Unrealized Losses (1,521) (5,198)  
Available for Sale, Fair Value $ 135,343 $ 137,024