Investment Securities Available for Sale (Details 3)	Jun. 30, 2012
State and municipal [Member]
Standard & Poor's ratings of investment securities available for sale
Available for securities fair value standard & poors credit rating	100.00%
Collateralized mortgage obligations [Member]
Standard & Poor's ratings of investment securities available for sale
Available for securities fair value standard & poors credit rating	100.00%
Other mortgage-backed [Member]
Standard & Poor's ratings of investment securities available for sale
Available for securities fair value standard & poors credit rating	100.00%
SBA loan-backed (federal agency) [Member]
Standard & Poor's ratings of investment securities available for sale
Available for securities fair value standard & poors credit rating	100.00%
Standard Poors Aa-A+ Rating [Member] | State and municipal [Member]
Standard & Poor's ratings of investment securities available for sale
Available for securities fair value standard & poors credit rating	42.00%
Standard Poors Aa-A+ Rating [Member] | Collateralized mortgage obligations [Member]
Standard & Poor's ratings of investment securities available for sale
Available for securities fair value standard & poors credit rating	100.00%
Standard Poors Aa-A+ Rating [Member] | Other mortgage-backed [Member]
Standard & Poor's ratings of investment securities available for sale
Available for securities fair value standard & poors credit rating	100.00%
Standard Poors Aa-A+ Rating [Member] | SBA loan-backed (federal agency) [Member]
Standard & Poor's ratings of investment securities available for sale
Available for securities fair value standard & poors credit rating	100.00%
Not Rated [Member] | State and municipal [Member]
Standard & Poor's ratings of investment securities available for sale
Available for securities fair value standard & poors credit rating	58.00%