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Investment Securities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011
Investment securities held to maturity
Amortized Cost	$ 16,568
Fair Value	17,750	17,864	19,872
State and municipal obligations
Investment securities held to maturity
Amortized Cost	16,568	16,569	18,699
Gross Unrealized Gains	1,182	1,295	1,173
Fair Value	$ 17,750	$ 17,864	$ 19,872

This item represents the aggregate fair value of investments in debt securities as of the balance sheet date and which are categorized as held-to-maturity.

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- Definition

As of the balance sheet date, the excess of fair value over carrying value (amortized cost) of a debt security categorized as held-to-maturity, exclusive of dividend or interest income recognized but not yet received and exclusive of any write-downs for other-than-temporary impairment. Such item represents the gross unrecognized holding gain.

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