Loans Loans Modified in Trouble Debt Restructurings (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Financing Receivable, Modifications [Line Items]
Number of Loans	2	5
Pre-Modification Outstanding Recorded Investment	$ 11	$ 44
Post-Modification Outstanding Recorded Investment	11	44
Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0
Pre-Modification Outstanding Recorded Investment	0	0
Post-Modification Outstanding Recorded Investment	0	0
Commercial Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0
Pre-Modification Outstanding Recorded Investment	0	0
Post-Modification Outstanding Recorded Investment	0	0
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0
Pre-Modification Outstanding Recorded Investment	0	0
Post-Modification Outstanding Recorded Investment	0	0
Other Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0
Pre-Modification Outstanding Recorded Investment	0	0
Post-Modification Outstanding Recorded Investment	0	0
Automobile [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	2	5
Pre-Modification Outstanding Recorded Investment	11	44
Post-Modification Outstanding Recorded Investment	11	44
Residential [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans	0	0
Pre-Modification Outstanding Recorded Investment	0	0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0