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Nature of Banking Activities and Significant Accounting Policies (Components Of Change In Unrealized Gains (Losses) On Securities) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Nature of Banking Activities and Significant Accounting Policiesl [Abstract]
Gross unrealized gain	$ 894	$ 2,669	$ 274
Reclassification adjustment for realized (gain) loss	(45)	(67)	(98)
Net unrealized gain (loss) before taxes	849	2,602	176
Tax effect	(289)	(885)	(60)
Net unrealized gain (loss) after taxes	$ 560	$ 1,717	$ 116

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Before tax amount of the appreciation (loss) in the value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) losses.

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Net of tax amount of the appreciation (loss) in the value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) losses.

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Tax effect of the appreciation (loss) in the value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) losses.

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Before tax amount of the income statement impact of the reclassification adjustment for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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Before tax and reclassification adjustments amount of unrealized holding gain (loss) and transfers on available-for-sale securities.

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