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Investment Securities (Available-for-sale Securities and Held-to-maturity Securities) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Available-For-Sale-Securities-And-Held-To-Maturity-Securities
Investment securities available for sale, Cost Basis	$ 140,771	$ 145,265
Investment securities available for sale, Gross Unrealized Gains	5,816	6,393
Investment securities available for sale, Gross Unrealized Losses	(98)	(120)
Investment securities available for sale, Fair Value	146,489	151,538
Investment securities held to maturity, Cost Basis	16,377	13,723
Investment securities held to maturity, Gross Unrealized Gains	503	598
Investment securities held to maturity, Gross Unrealized Losses	(33)	(55)
Investment securities held to maturity, Fair Value	16,847	14,266
U.S. Agency [Member]
Available-For-Sale-Securities-And-Held-To-Maturity-Securities
Investment securities available for sale, Cost Basis	6,850	5,848
Investment securities available for sale, Gross Unrealized Gains	61	70
Investment securities available for sale, Gross Unrealized Losses	(8)	(7)
Investment securities available for sale, Fair Value	6,903	5,911
U.S. Agency mortgage-backed securities [Member]
Available-For-Sale-Securities-And-Held-To-Maturity-Securities
Investment securities available for sale, Cost Basis	124,928	131,425
Investment securities available for sale, Gross Unrealized Gains	5,703	6,320
Investment securities available for sale, Gross Unrealized Losses	(18)	(10)
Investment securities available for sale, Fair Value	130,613	137,735
Investment securities held to maturity, Cost Basis	11,370	9,318
Investment securities held to maturity, Gross Unrealized Gains	498	578
Investment securities held to maturity, Gross Unrealized Losses	(24)
Investment securities held to maturity, Fair Value	11,844	9,896
Corporate bonds [Member]
Available-For-Sale-Securities-And-Held-To-Maturity-Securities
Investment securities available for sale, Cost Basis	8,993	7,992
Investment securities available for sale, Gross Unrealized Gains	52	3
Investment securities available for sale, Gross Unrealized Losses	(72)	(103)
Investment securities available for sale, Fair Value	8,973	7,892
Corporate bonds and other securities [Member]
Available-For-Sale-Securities-And-Held-To-Maturity-Securities
Investment securities held to maturity, Cost Basis	3,995	3,995
Investment securities held to maturity, Gross Unrealized Gains		14
Investment securities held to maturity, Gross Unrealized Losses	(9)	(55)
Investment securities held to maturity, Fair Value	3,986	3,954
Taxable Municipal [Member]
Available-For-Sale-Securities-And-Held-To-Maturity-Securities
Investment securities held to maturity, Cost Basis	1,012	410
Investment securities held to maturity, Gross Unrealized Gains	5	6
Investment securities held to maturity, Gross Unrealized Losses
Investment securities held to maturity, Fair Value	$ 1,017	$ 416

X

- Definition

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

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- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

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- Definition

For an unclassified balance sheet, this item represents investments in debt securities which are categorized as held-to-maturity. The held-to-maturity category is for those securities that the entity has the positive intent and ability to hold until maturity.

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-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Number 115

-Paragraph 19

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As of the balance sheet date, the excess of carrying value (amortized cost) over fair value 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 loss.

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