Investment Securities (Investments Classified by Contractual Maturity Date) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Investment Securities [Abstract]
Available for Sale: Amortized Cost: Due in 1 year or less	$ 16,066
Available for Sale: Amortized Cost: After 1 year to 5 years	67,168
Available for Sale: Amortized Cost: After 5 years to 10 years	90,263
Available for Sale: Amortized Cost: After 10 years	14,170
Available for Sale: Amortized Cost: Total	187,667
Available for Sale: Estimated Fair Value: Due in 1 year or less	16,429
Available for Sale: Estimated Fair Value: After 1 year to 5 years	69,049
Available for Sale: Estimated Fair Value: After 5 years to 10 years	88,605
Available for Sale: Estimated Fair Value: After 10 years	15,176
Available for Sale: Estimated Fair Value: Total	189,259	174,323
Held to Maturity: Amortized Cost: Due in 1 year or less	46
Held to Maturity: Amortized Cost: After 1 year to 5 years	21
Held to Maturity: Amortized Cost: Total	67
Held to Maturity: Estimated Fair Value: Due in 1 year or less	48
Held to Maturity: Estimated Fair Value: After 1 year to 5 years	21
Held to Maturity: Estimated Fair Value: Total	$ 69

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

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