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Securities (Summary Of Amortized Cost, Unrealized Gains, Unrealized Losses And Estimated Fair Values) (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Jun. 30, 2015
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost $ 253,671 $ 276,443 $ 272,414
Available for sale securities, Unrealized Gains 8,838 5,576 5,982
Available for sale securities, Unrealized Losses 876 1,227 1,735
Available for sale securities, Estimated Fair Value 261,633 280,792 [1] 276,661
U S Government Corporations And Agencies Securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 16,815 20,461 24,336
Available for sale securities, Unrealized Gains 1,123 1,063 1,093
Available for sale securities, Unrealized Losses 53 49 40
Available for sale securities, Estimated Fair Value 17,885 21,475 25,389
Government Sponsored Agencies [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 136,821 145,586 150,675
Available for sale securities, Unrealized Gains 2,862 1,943 3,005
Available for sale securities, Unrealized Losses 318 795 737
Available for sale securities, Estimated Fair Value 139,365 146,734 152,943
Nongovernment Sponsored Agencies [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 6,265 7,836 9,880
Available for sale securities, Unrealized Gains 61 82 116
Available for sale securities, Unrealized Losses 41 33 34
Available for sale securities, Estimated Fair Value 6,285 7,885 9,962
State and Policital Subdivisions Water and Sewer Revenues [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 250 250 500
Available for sale securities, Unrealized Gains 0 0 3
Available for sale securities, Unrealized Losses 0 0 0
Available for sale securities, Estimated Fair Value 250 250 503
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   1,729  
Available for sale securities, Unrealized Gains   0  
Available for sale securities, Unrealized Losses   26  
Available for sale securities, Estimated Fair Value   1,703  
Corporate Debt Securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 19,928 14,494 11,896
Available for sale securities, Unrealized Gains 60 0 0
Available for sale securities, Unrealized Losses 460 268 90
Available for sale securities, Estimated Fair Value 19,528 14,226 11,806
Taxable Debt Securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 180,079 190,356 198,505
Available for sale securities, Unrealized Gains 4,106 3,088 4,217
Available for sale securities, Unrealized Losses 872 1,171 938
Available for sale securities, Estimated Fair Value 183,313 192,273 201,784
State and Political Subdivisions General Obligations [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 41,282 52,490 49,067
Available for sale securities, Unrealized Gains 2,788 1,767 1,463
Available for sale securities, Unrealized Losses 4 41 586
Available for sale securities, Estimated Fair Value 44,066 54,216 49,944
State and Political Subdivisions Water and Sewer Revenues [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 7,535 7,614 7,982
Available for sale securities, Unrealized Gains 360 172 52
Available for sale securities, Unrealized Losses 0 0 33
Available for sale securities, Estimated Fair Value 7,895 7,786 8,001
State and Political Subdivisions Special Tax Revenues [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost   4,532 4,548
Available for sale securities, Unrealized Gains   72 30
Available for sale securities, Unrealized Losses   0 72
Available for sale securities, Estimated Fair Value   4,604 4,506
State and Political Subdivisions Sales Tax Revenues [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 2,889    
Available for sale securities, Unrealized Gains 182    
Available for sale securities, Unrealized Losses 0    
Available for sale securities, Estimated Fair Value 3,071    
State and Political Subdivisions Lease Revenues [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 6,267 8,671  
Available for sale securities, Unrealized Gains 458 187  
Available for sale securities, Unrealized Losses 0 1  
Available for sale securities, Estimated Fair Value 6,725 8,857  
State and Political Subdivisions Lottery/casino Revenues [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost     3,576
Available for sale securities, Unrealized Gains     58
Available for sale securities, Unrealized Losses     74
Available for sale securities, Estimated Fair Value     3,560
State and Political Subdivisions Other Revenues [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 15,542 12,703 8,729
Available for sale securities, Unrealized Gains 944 290 162
Available for sale securities, Unrealized Losses 0 14 32
Available for sale securities, Estimated Fair Value 16,486 12,979 8,859
Tax Exempt Debt Securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 73,515 86,010 73,902
Available for sale securities, Unrealized Gains 4,732 2,488 1,765
Available for sale securities, Unrealized Losses 4 56 797
Available for sale securities, Estimated Fair Value 78,243 88,442 74,870
Equity Securities [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Total Amortized Cost 77 77 7
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 $ 77 $ 77 $ 7
[1] December 31, 2015 financial information has been extracted from audited consolidated financial statements