Investment Securities (Narrative) (Details) (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Schedule of Investments [Line Items]
Loss Positions More Than Twelve Months	25
Book value of corporate bonds	$ 8,600,000
Unrealized losses on corporate bonds	345,000
Available-for-sale Securities Pledged as Collateral	$ 92,000,000	$ 128,000,000
Corporate bonds [Member]
Schedule of Investments [Line Items]
Securities in unrealized loss positions qualitative disclosure number of positions	21
Securities in unrealized loss positions qualitative disclosure severity	Some of the bonds have had downgrades since they were purchased. Some of the Corporates have been affected by the market's perception of the impact of sovereign debit holdings and spreads on the financial sector have widened since they were purchased.
Securities in unrealized loss position more than 12 months qualitative disclosure number of positions	8
US Government agency obligations [Member]
Schedule of Investments [Line Items]
Securities in unrealized loss positions qualitative disclosure number of positions	8
Collateralized mortgage obligations GSE [Member]
Schedule of Investments [Line Items]
Securities in unrealized loss positions qualitative disclosure number of positions	2
State and municipal tax-exempt [Member]
Schedule of Investments [Line Items]
Securities in unrealized loss positions qualitative disclosure number of positions	1
Asset-backed securities [Member]
Schedule of Investments [Line Items]
Securities in unrealized loss positions qualitative disclosure number of positions	1
Equity securities [Member]
Schedule of Investments [Line Items]
Securities in unrealized loss positions qualitative disclosure number of positions	6
Securities in unrealized loss positions qualitative disclosure severity	The severity and duration of the impairment are driven by higher collateral losses, wider credit spreads, and changes in interest rates within the financial services sector.
Securities in unrealized loss position more than 12 months qualitative disclosure number of positions	6