Troubled Debt Restructurings (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012 Investment
Summary of TDRs that are more than 60 days past due, and have subsequently defaulted
Number of loans	5
Recorded investment	$ 2,341
Commercial [Member] | Owner occupied RE [Member]
Summary of TDRs that are more than 60 days past due, and have subsequently defaulted
Number of loans	3
Recorded investment	2,229
Commercial [Member] | Non-owner occupied RE [Member]
Summary of TDRs that are more than 60 days past due, and have subsequently defaulted
Number of loans
Recorded investment
Commercial [Member] | Business [Member]
Summary of TDRs that are more than 60 days past due, and have subsequently defaulted
Number of loans	2
Recorded investment	112
Commercial [Member] | Construction [Member]
Summary of TDRs that are more than 60 days past due, and have subsequently defaulted
Number of loans
Recorded investment
Consumer [Member] | Real estate [Member]
Summary of TDRs that are more than 60 days past due, and have subsequently defaulted
Number of loans
Recorded investment
Consumer [Member] | Construction [Member]
Summary of TDRs that are more than 60 days past due, and have subsequently defaulted
Number of loans
Recorded investment
Consumer [Member] | Home equity [Member]
Summary of TDRs that are more than 60 days past due, and have subsequently defaulted
Number of loans
Recorded investment
Consumer [Member] | Other [Member]
Summary of TDRs that are more than 60 days past due, and have subsequently defaulted
Number of loans
Recorded investment