Investment Securities (Details 4) (USD $)	Mar. 31, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Unrealized loss position on other securities	$ (1,831,000)	$ (3,663,000)
Investment Securities (Textuals) [Abstract]
Federal Home Loan Bank Stock	108,000,000	121,000,000
Federal Reserve Bank Stock	70,000,000
US Treasury Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of investment securities in an unrealized position less than Twelve months	1
Unrealized loss position on other securities	(4,000)
Obligations of state and political subdivisions [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of investment securities in an unrealized position less than Twelve months	35
Number of investment securities in an unrealized position for Twelve months or more	1
Unrealized loss position on other securities	(258,000)	(28,000)
Residential mortgage-related securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of investment securities in an unrealized position less than Twelve months	18
Number of investment securities in an unrealized position for Twelve months or more	16
Unrealized loss position on other securities	(879,000)	(1,463,000)
Asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of investment securities in an unrealized position less than Twelve months	1
Number of investment securities in an unrealized position for Twelve months or more	28
Unrealized loss position on other securities	$ (453,000)	$ (707,000)
Trust Preferred Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of individual trust preferred debt securities	2
Floating rate notes [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of investment securities in an unrealized position for Twelve months or more	1