Loans and Allowance for Loan Losses (Summary of All Troubled Debt Restructuring Loans (Accruing and Non Accruing) by Portfolio Segment) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Financing Receivable, Modifications [Line Items]
Number of Contracts	30
Pre-Modification Outstanding Recorded Investment	$ 6,213
Post-Modification Outstanding Recorded Investment	6,389
Current Balance	5,868
Number of contracts that subsequently defaulted	1
Recorded investment of troubled-debt restructurings that subsequently defaulted	65
Residential real estate loans
Financing Receivable, Modifications [Line Items]
Number of Contracts	20
Pre-Modification Outstanding Recorded Investment	3,305
Post-Modification Outstanding Recorded Investment	3,434
Current Balance	3,286
Number of contracts that subsequently defaulted	1
Recorded investment of troubled-debt restructurings that subsequently defaulted	65
Commercial real estate loans
Financing Receivable, Modifications [Line Items]
Number of Contracts	6
Pre-Modification Outstanding Recorded Investment	2,602
Post-Modification Outstanding Recorded Investment	2,649
Current Balance	2,344
Commercial loans
Financing Receivable, Modifications [Line Items]
Number of Contracts	3
Pre-Modification Outstanding Recorded Investment	303
Post-Modification Outstanding Recorded Investment	303
Current Balance	236
Consumer loans
Financing Receivable, Modifications [Line Items]
Number of Contracts	1
Pre-Modification Outstanding Recorded Investment	3
Post-Modification Outstanding Recorded Investment	3
Current Balance	$ 2