Investment Securities (Investments Classified By Contractual Maturity Date) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Investment Securities [Abstract]
Held to Maturity, Due in one year or less, Amortized Cost	$ 714
Held to Maturity, Due after five years through ten years, Amortized Cost	23,998
Held to Maturity, Due after ten years, Amortized Cost	42,262
Held to Maturity, Total investment securities, Amortized Cost	66,974	66,024
Held to Maturity, Due in one year or less, Estimated Fair Value	714
Held to Maturity, Due after five years through ten years, Estimated Fair Value	25,077
Held to Maturity, Due after ten years, Estimated Fair Value	42,679
Held-to-maturity, Total investment securities, Estimated Fair Value	68,470	68,307
Available for Sale, Due in one year or less, Amortized Cost	9,838
Available for Sale, Due after one year through five years, Amortized Cost	36,937
Available for Sale, Due after five years through ten years, Amortized Cost	34,565
Available for Sale, Due after ten years, Amortized Cost	51,162
Available for Sale, No state maturity, Amortized Cost	27
Available for Sale, Total investment securities, Amortized Cost	132,529	134,035
Available for Sale, Due in one year or less, Estimated Fair Value	9,874
Available for Sale, Due after one year through five years, Estimated Fair Value	37,577
Available for Sale, Due after five years through ten years, Estimated Fair Value	34,616
Available for Sale, Due after ten years, Estimated Fair Value	51,473
Available for Sale, No stated maturity, Estimated Fair Value	15
Available for Sale, Total investment securities, Estimated Fair Value	$ 133,555	$ 135,288

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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