Investments (Amortized Cost And Fair Values Classified By Contractual Maturity Date) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of Investments [Line Items]
Amortized Cost: Due after five years through ten years	$ 43,613
Amortized Cost: Due after ten years	88,731
Amortized Cost: Sub Total	132,344
Fair Value: Due after five years through ten years	44,935
Fair Value: Due after ten years	64,881
Available For Sale Debt Maturities Fair Value Sub Total	109,816
Available-for-sale Securities, Amortized Cost Basis	245,106	267,161
Available-for-sale Securities	223,273	245,023
Amortized Cost: Due after ten years	4,040
Fair Value: Due after ten years	4,347
Residential mortgage-backed agencies [Member]
Schedule of Investments [Line Items]
Amortized Cost: without Single Maturity Date	43,596
Fair Value: without Single Maturity Date	44,108
Available-for-sale Securities, Amortized Cost Basis	43,596	43,630
Available-for-sale Securities	44,108	44,552
Commercial mortgage-backed agencies [Member]
Schedule of Investments [Line Items]
Amortized Cost: without Single Maturity Date	37,330
Fair Value: without Single Maturity Date	37,618
Available-for-sale Securities, Amortized Cost Basis	37,330	48,112
Available-for-sale Securities	37,618	48,277
Collateralized mortgage obligations [Member]
Schedule of Investments [Line Items]
Amortized Cost: without Single Maturity Date	31,836
Fair Value: without Single Maturity Date	31,731
Available-for-sale Securities, Amortized Cost Basis	31,836	48,120
Available-for-sale Securities	$ 31,731	$ 48,351