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Investments (Aggregate Carrying And Approximate Market Values Of Held-To-Maturity Securities) (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Schedule of Held-to-maturity Securities [Line Items]    
Securities held-to-maturity, Amortized Cost $ 81,095 $ 90,786
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain 2,910 3,405
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss 0 0
Securities held-to-maturity, Estimated Fair Value 84,005 94,191
Other Investments and Securities, at Cost 9,926 9,857
Other Investment Not Readily Marketable, Fair Value 9,926 9,857
U.S. Government Agencies Mortgage-backed Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Securities held-to-maturity, Amortized Cost 77,095 86,742
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain 2,910 2,733
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss 0 0
Securities held-to-maturity, Estimated Fair Value 80,005 89,475
Trust Preferred Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Securities held-to-maturity, Amortized Cost 4,000 4,044
Held-to-maturity Securities, Accumulated Unrecognized Holding Gain 0 672
Held-to-maturity Securities, Accumulated Unrecognized Holding Loss 0 0
Securities held-to-maturity, Estimated Fair Value 4,000 4,716
Non-Marketable Equity Securities [Member]    
Schedule of Held-to-maturity Securities [Line Items]    
Other Investments and Securities, at Cost 9,926 9,857
Other Investment Not Readily Marketable, Fair Value $ 9,926 $ 9,857