Investment Securities (Summary Of Amortized Cost And Fair Values Of Investment Securities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Held To Maturity Securities And Available For Sale Securities [Line Items]
Amortized Cost, Held to Maturity	$ 12,797	$ 15,252
Gross Unrealized Gains, Held to Maturity	862	633
Fair Value, Held to Maturity	13,659	15,885
Amortized Cost, Available for Sale	358,317	253,869
Gross Unrealized Gains, Available for Sale	6,526	6,379
Gross Unrealized Losses, Available for Sale	(528)	(148)
Fair Value, Available for Sale	364,315	260,100
Federal Agency Securities [Member]
Held To Maturity Securities And Available For Sale Securities [Line Items]
Amortized Cost, Available for Sale	114,159	64,524
Gross Unrealized Gains, Available for Sale	1,474	1,051
Gross Unrealized Losses, Available for Sale	(19)	(22)
Fair Value, Available for Sale	115,614	65,553
Obligations Of State And Political Subdivisions [Member]
Held To Maturity Securities And Available For Sale Securities [Line Items]
Amortized Cost, Held to Maturity	12,797	15,252
Gross Unrealized Gains, Held to Maturity	862	633
Fair Value, Held to Maturity	13,659	15,885
Amortized Cost, Available for Sale	34,754	10,926
Gross Unrealized Gains, Available for Sale	887	196
Gross Unrealized Losses, Available for Sale	(83)	(19)
Fair Value, Available for Sale	35,558	11,103
Residential Mortgage-Backed Securities [Member]
Held To Maturity Securities And Available For Sale Securities [Line Items]
Amortized Cost, Available for Sale	200,310	177,365
Gross Unrealized Gains, Available for Sale	3,668	4,889
Gross Unrealized Losses, Available for Sale	(303)	(107)
Fair Value, Available for Sale	203,675	182,147
Asset-Backed Securities [Member]
Held To Maturity Securities And Available For Sale Securities [Line Items]
Amortized Cost, Available for Sale	7,794
Gross Unrealized Losses, Available for Sale	(123)
Fair Value, Available for Sale	7,671
Equity Securities [Member]
Held To Maturity Securities And Available For Sale Securities [Line Items]
Amortized Cost, Available for Sale	1,300	1,054
Gross Unrealized Gains, Available for Sale	497	243
Fair Value, Available for Sale	$ 1,797	$ 1,297

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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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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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

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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