Securities (Narrative) (Details) (USD $)	12 Months Ended
Securities (Narrative) (Details) (USD $)	Dec. 31, 2011 security
U.S. Government and Government-Sponsored Enterprise Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number Of Securities In Unrealized Loss Position	35
Number Of Securities In Continuous Loss Position For Twelve Months or More	2
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Issuances Of Securities Exceeding Shareholders Equity Threshold, Percent	10.00%
Number Of Securities In Continuous Loss Position For Twelve Months or More	1
Number Of Issuances Of Securities Exceeding Shareholders Equity Threshold	0
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Number Of Securities In Unrealized Loss Position	8
Number Of Securities In Continuous Loss Position For Twelve Months or More	1
Number Of Other Than Temporarily Impaired Securities	1
Available-for-sale Securities, Par Value	$ 3,000,000
Available-for-sale Securities, Present Value Of Expected Future Cash Flows	0
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	$ 3,000,000

The amount of other than temporary impairment losses on investments in debt and equity securities categorized as Available-for-sale which have been recognized in earnings during the period. Such impairment losses consist of other than temporary impairments (OTTI) on equity securities, credit losses on investments in debt securities, and when the entity intends to sell an impaired debt security or it is more likely than not that the entity will be required to sell the impaired debt security before recovery of its amortized cost basis.

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