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Investments (Aggregate Carrying And Approximate Market Values Of Available-For-Sale Securities) (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]    
Securities available-for-sale, Amortized Cost $ 425,094 $ 367,884
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 10,974 5,099
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 1,351 3,517
Securities available-for-sale 434,717 369,466
U.S Treasuries and U.S. Government Agencies [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Securities available-for-sale, Amortized Cost 4 5
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 0 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 0 0
Securities available-for-sale 4 5
Obligations Of States And Political Subdivisions [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Securities available-for-sale, Amortized Cost 62,845 49,725
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 1,669 979
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 79 7
Securities available-for-sale 64,435 50,697
U.S. Government Agencies Mortgage-backed Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Securities available-for-sale, Amortized Cost 327,608 287,933
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 5,896 2,285
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 302 2,021
Securities available-for-sale 333,202 288,197
Private Label [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Securities available-for-sale, Amortized Cost 1,000 1,222
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 2 9
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 0 0
Securities available-for-sale 1,002 1,231
Trust Preferred Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Securities available-for-sale, Amortized Cost 6,049 6,550
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 1,206 463
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 844 1,155
Securities available-for-sale 6,411 5,858
Corporate Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Securities available-for-sale, Amortized Cost 23,927 18,793
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 613 221
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 126 321
Securities available-for-sale 24,414 18,693
Debt Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Securities available-for-sale, Amortized Cost 421,433 364,228
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 9,386 3,957
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 1,351 3,504
Securities available-for-sale 429,468 364,681
Equity Securities [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Securities available-for-sale, Amortized Cost 2,136 2,131
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 1,577 1,142
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 0 0
Securities available-for-sale 3,713 3,273
Money Market Funds [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Securities available-for-sale, Amortized Cost 1,525 1,525
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax 11 0
Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax 0 13
Securities available-for-sale $ 1,536 $ 1,512