Credit Quality of Loans and Allowance for Loan Losses (Details 6) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012 Loan
Paid in Full [Member]
Successes and failures of types of modifications
Number of Loans
Recorded Investment
Paid in Full [Member] | Below Market Interest Rate [Member]
Successes and failures of types of modifications
Number of Loans
Recorded Investment
Paid in Full [Member] | Extended Payment Terms [Member]
Successes and failures of types of modifications
Number of Loans
Recorded Investment
Paid in Full [Member] | Forgiveness of Principal [Member]
Successes and failures of types of modifications
Number of Loans
Recorded Investment
Paying as Restructured [Member]
Successes and failures of types of modifications
Number of Loans	9
Recorded Investment	4,703
Paying as Restructured [Member] | Below Market Interest Rate [Member]
Successes and failures of types of modifications
Number of Loans	4
Recorded Investment	3,724
Paying as Restructured [Member] | Extended Payment Terms [Member]
Successes and failures of types of modifications
Number of Loans	5
Recorded Investment	985
Paying as Restructured [Member] | Forgiveness of Principal [Member]
Successes and failures of types of modifications
Number of Loans
Recorded Investment
Converted to Non-accrual [Member]
Successes and failures of types of modifications
Number of Loans	1
Recorded Investment	545
Converted to Non-accrual [Member] | Below Market Interest Rate [Member]
Successes and failures of types of modifications
Number of Loans	1
Recorded Investment	545
Converted to Non-accrual [Member] | Extended Payment Terms [Member]
Successes and failures of types of modifications
Number of Loans
Recorded Investment
Converted to Non-accrual [Member] | Forgiveness of Principal [Member]
Successes and failures of types of modifications
Number of Loans
Recorded Investment
Foreclosure Default [Member]
Successes and failures of types of modifications
Number of Loans
Recorded Investment
Foreclosure Default [Member] | Below Market Interest Rate [Member]
Successes and failures of types of modifications
Number of Loans
Recorded Investment
Foreclosure Default [Member] | Extended Payment Terms [Member]
Successes and failures of types of modifications
Number of Loans
Recorded Investment
Foreclosure Default [Member] | Forgiveness of Principal [Member]
Successes and failures of types of modifications
Number of Loans
Recorded Investment