Other Operating Expenses (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Component of Operating Other Cost and Expense [Line Items]
Other operating expense	$ 2,831	$ 2,671	$ 2,913
Postage and Courier Expenses [Member]
Component of Operating Other Cost and Expense [Line Items]
Other operating expense	162	194	303
Paper and Supplies [Member]
Component of Operating Other Cost and Expense [Line Items]
Other operating expense	186	171	252
Taxes Other than Income Taxes [Member]
Component of Operating Other Cost and Expense [Line Items]
Other operating expense	289	288	308
Charge Offs, Other Than Loan Charge Offs [Member]
Component of Operating Other Cost and Expense [Line Items]
Other operating expense	287	273	388
Telephone [Member]
Component of Operating Other Cost and Expense [Line Items]
Other operating expense	271	316	286
Directors' Compensation [Member]
Component of Operating Other Cost and Expense [Line Items]
Other operating expense	248	235	446
Managed Service Agreements [Member]
Component of Operating Other Cost and Expense [Line Items]
Other operating expense	362	238	0
Other (no items exceed 1% of total revenue) [Member]
Component of Operating Other Cost and Expense [Line Items]
Other operating expense	$ 1,026	$ 956	$ 930