Fair Value of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Carrying Amount [Member]
Assets
Cash and Short-Term Investments	$ 65,975	$ 112,329
Investment Securities Available for Sale	294,945	303,891
Investment Securities Held to Maturity	44	46
Federal Home Loan Bank Stock	4,159	5,398
Loans, Net	700,917	700,614
Liabilities
Deposits	972,135	999,985
Subordinated Debentures	24,229	24,229
Other Borrowed Money	35,000	71,000
Estimated Fair Value [Member]
Assets
Cash and Short-Term Investments	65,975	112,329
Investment Securities Available for Sale	294,945	303,891
Investment Securities Held to Maturity	45	46
Federal Home Loan Bank Stock	4,159	5,398
Loans, Net	701,642	702,438
Liabilities
Deposits	975,285	1,003,648
Subordinated Debentures	24,229	24,229
Other Borrowed Money	$ 38,804	$ 74,720