Investment Securities Available for Sale (Details 2)	Jun. 30, 2012
State and municipal [Member]
Moodys Ratings of investment securities available for sale
Available for securities fair value moodys credit rating	100.00%
Collateralized mortgage obligations [Member]
Moodys Ratings of investment securities available for sale
Available for securities fair value moodys credit rating	100.00%
Other mortgage-backed [Member]
Moodys Ratings of investment securities available for sale
Available for securities fair value moodys credit rating	100.00%
SBA loan-backed (federal agency) [Member]
Moodys Ratings of investment securities available for sale
Available for securities fair value moodys credit rating	100.00%
Moody's, Aaa Rating [Member] | Collateralized mortgage obligations [Member]
Moodys Ratings of investment securities available for sale
Available for securities fair value moodys credit rating	100.00%
Moody's, Aaa Rating [Member] | Other mortgage-backed [Member]
Moodys Ratings of investment securities available for sale
Available for securities fair value moodys credit rating	100.00%
Moody's, Aaa Rating [Member] | SBA loan-backed (federal agency) [Member]
Moodys Ratings of investment securities available for sale
Available for securities fair value moodys credit rating	100.00%
Moodys Aa1 - A1 Rating [Member] | State and municipal [Member]
Moodys Ratings of investment securities available for sale
Available for securities fair value moodys credit rating	74.00%
Moody's, Baa2 Rating [Member] | State and municipal [Member]
Moodys Ratings of investment securities available for sale
Available for securities fair value moodys credit rating	14.00%
Not Rated [Member] | State and municipal [Member]
Moodys Ratings of investment securities available for sale
Available for securities fair value moodys credit rating	12.00%