Loans and Allowance for Loan Losses (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Components of segments portfolio and percentage change in total loans
Total loans	$ 1,060,996,000	$ 1,072,422,000	$ 1,122,999,000
Percentage of loans and leases receivable in aggregate loans and leases receivable	100.00%	100.00%
Loans and leases receivable net of deferred income increase decrease percentage	(1.10%)
Commercial and industrial [Member]
Components of segments portfolio and percentage change in total loans
Total loans	277,428,000	266,548,000
Percentage of loans and leases receivable in aggregate loans and leases receivable	26.20%	24.80%
Loans and leases receivable net of deferred income increase decrease percentage	4.10%
Vacant land, land development and residential construction [Member]
Components of segments portfolio and percentage change in total loans
Total loans	58,774,000	63,467,000
Percentage of loans and leases receivable in aggregate loans and leases receivable	5.50%	5.90%
Loans and leases receivable net of deferred income increase decrease percentage	(7.40%)
Real Estate - Owner Occupied [Member]
Components of segments portfolio and percentage change in total loans
Total loans	276,361,000	264,426,000
Percentage of loans and leases receivable in aggregate loans and leases receivable	26.10%	24.70%
Loans and leases receivable net of deferred income increase decrease percentage	4.50%
Real Estate - Non-Owner Occupied [Member]
Components of segments portfolio and percentage change in total loans
Total loans	318,476,000	334,165,000
Percentage of loans and leases receivable in aggregate loans and leases receivable	30.00%	31.20%
Loans and leases receivable net of deferred income increase decrease percentage	(4.70%)
Real Estate - Multi-Family and Residential Rental [Member]
Components of segments portfolio and percentage change in total loans
Total loans	56,452,000	68,299,000
Percentage of loans and leases receivable in aggregate loans and leases receivable	5.30%	6.40%
Loans and leases receivable net of deferred income increase decrease percentage	(17.30%)
Total commercial [Member]
Components of segments portfolio and percentage change in total loans
Total loans	987,491,000	996,905,000	1,045,406,000
Percentage of loans and leases receivable in aggregate loans and leases receivable	93.10%	93.00%
Loans and leases receivable net of deferred income increase decrease percentage	(0.90%)
Retail Home Equity and Other [Member]
Components of segments portfolio and percentage change in total loans
Total loans	40,883,000	42,336,000
Percentage of loans and leases receivable in aggregate loans and leases receivable	3.90%	3.90%
Loans and leases receivable net of deferred income increase decrease percentage	(3.40%)
Retail 1-4 Family Mortgages [Member]
Components of segments portfolio and percentage change in total loans
Total loans	32,622,000	33,181,000
Percentage of loans and leases receivable in aggregate loans and leases receivable	3.00%	3.10%
Loans and leases receivable net of deferred income increase decrease percentage	(1.70%)
Total retail [Member]
Components of segments portfolio and percentage change in total loans
Total loans	$ 73,505,000	$ 75,517,000	$ 77,593,000
Percentage of loans and leases receivable in aggregate loans and leases receivable	6.90%	7.00%
Loans and leases receivable net of deferred income increase decrease percentage	(2.70%)