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Securities (Summary Of Amortized Cost, Unrealized Gains, Unrealized Losses And Estimated Fair Values) (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Jun. 30, 2014
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost $ 272,414 $ 276,631 $ 283,248
Available for sale securities, Unrealized Gains 5,982 7,170 6,339
Available for sale securities, Unrealized Losses 1,735 967 1,704
Available for sale securities, Estimated Fair Value 276,661 282,834 [1] 287,883
U S Government Corporations And Agencies Securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 24,336 22,153 24,998
Available for sale securities, Unrealized Gains 1,093 1,073 885
Available for sale securities, Unrealized Losses 40 52 53
Available for sale securities, Estimated Fair Value 25,389 23,174 25,830
Government Sponsored Agencies [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 150,675 147,951 155,631
Available for sale securities, Unrealized Gains 3,005 2,599 2,921
Available for sale securities, Unrealized Losses 737 773 997
Available for sale securities, Estimated Fair Value 152,943 149,777 157,555
Nongovernment Sponsored Agencies [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 9,880 12,051 9,555
Available for sale securities, Unrealized Gains 116 142 385
Available for sale securities, Unrealized Losses 34 48 9
Available for sale securities, Estimated Fair Value 9,962 12,145 9,931
U S States And Political Subdivisions General Obligations [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 0 1,975 4,532
Available for sale securities, Unrealized Gains 0 2 9
Available for sale securities, Unrealized Losses 0 33 144
Available for sale securities, Estimated Fair Value 0 1,944 4,397
State and Policital Subdivisions Water and Sewer Revenues [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 500 1,976 2,382
Available for sale securities, Unrealized Gains 3 14 7
Available for sale securities, Unrealized Losses 0 7 44
Available for sale securities, Estimated Fair Value 503 1,983 2,345
State and Political Subdivisions Lottery/Casino Revenues [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 1,218    
Available for sale securities, Unrealized Gains 0    
Available for sale securities, Unrealized Losses 37    
Available for sale securities, Estimated Fair Value 1,181    
State and Policital Subdivisions Other Revenues [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 0 4,696 3,319
Available for sale securities, Unrealized Gains 0 73 7
Available for sale securities, Unrealized Losses 0 2 33
Available for sale securities, Estimated Fair Value 0 4,767 3,293
Corporate Debt Securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 11,896 3,776 0
Available for sale securities, Unrealized Gains 0 0 0
Available for sale securities, Unrealized Losses 90 0 0
Available for sale securities, Estimated Fair Value 11,806 3,776 0
Taxable Debt Securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 198,505 194,578 200,417
Available for sale securities, Unrealized Gains 4,217 3,903 4,214
Available for sale securities, Unrealized Losses 938 915 1,280
Available for sale securities, Estimated Fair Value 201,784 197,566 203,351
State and Political Subdivisions General Obligations [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 49,067 49,515 46,859
Available for sale securities, Unrealized Gains 1,463 2,338 1,552
Available for sale securities, Unrealized Losses 586 12 204
Available for sale securities, Estimated Fair Value 49,944 51,841 48,207
State and Political Subdivisions Water and Sewer Revenues [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 7,982 11,258 11,868
Available for sale securities, Unrealized Gains 52 244 176
Available for sale securities, Unrealized Losses 33 3 58
Available for sale securities, Estimated Fair Value 8,001 11,499 11,986
State and Political Subdivisions Special Tax Revenues [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 4,548    
Available for sale securities, Unrealized Gains 30    
Available for sale securities, Unrealized Losses 72    
Available for sale securities, Estimated Fair Value 4,506    
State and Political Subdivisions Lease Revenues [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost   4,617 7,990
Available for sale securities, Unrealized Gains   75 54
Available for sale securities, Unrealized Losses   10 68
Available for sale securities, Estimated Fair Value   4,682 7,976
State and Political Subdivisions Lottery/casino Revenues [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 3,576 3,811 3,832
Available for sale securities, Unrealized Gains 58 206 145
Available for sale securities, Unrealized Losses 74 9 41
Available for sale securities, Estimated Fair Value 3,560 4,008 3,936
State and Political Subdivisions Other Revenues [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 8,729 12,845 12,205
Available for sale securities, Unrealized Gains 162 404 198
Available for sale securities, Unrealized Losses 32 18 53
Available for sale securities, Estimated Fair Value 8,859 13,231 12,350
Tax Exempt Debt Securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 73,902 82,046 82,754
Available for sale securities, Unrealized Gains 1,765 3,267 2,125
Available for sale securities, Unrealized Losses 797 52 424
Available for sale securities, Estimated Fair Value 74,870 85,261 84,455
Equity Securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 7 7 77
Available for sale securities, Unrealized Gains 0 0 0
Available for sale securities, Unrealized Losses 0 0 0
Available for sale securities, Estimated Fair Value $ 7 $ 7 $ 77
[1] December 31, 2014 financial information has been extracted from audited consolidated financial statements