Loans and Allowance for Loan Losses (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Loans and Allowance for Loan Losses (Textual) [Abstract]
Total loans	$ 1,060,996,000	$ 1,122,999,000	$ 1,060,996,000	$ 1,122,999,000	$ 1,072,422,000
Amount of decrease in total loans			11,400,000
Percentage decrease in total loans			1.10%
Interest income recognized on impaired loans	400,000		800,000
Number of past due days for loans modified as TDR			30 days
Purchases of loans not held-for-sale		0		0
Sales of loans not held-for-sale		0		0
Reclassifications of loans held-for-sale		0		0
Maximum interest income recognized on impaired loans		$ 100,000		$ 100,000