Loans and Allowance for Loan Losses (Details 5) (USD $)	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Loans by credit quality indicators
Total loans	$ 1,060,996,000	$ 1,072,422,000	$ 1,122,999,000
Commercial and Industrial [Member]
Loans by credit quality indicators
Total loans	277,428,000	266,548,000
Commercial and Industrial [Member] | Grades 1-4 [Member]
Loans by credit quality indicators
Total loans	176,712,000	169,231,000
Commercial and Industrial [Member] | Grades 5-7 [Member]
Loans by credit quality indicators
Total loans	94,025,000	89,463,000
Commercial and Industrial [Member] | Grades 8-9 [Member]
Loans by credit quality indicators
Total loans	6,691,000	7,854,000
Commercial Vacant Land, Land Development, and Residential Construction [Member]
Loans by credit quality indicators
Total loans	58,774,000	63,467,000
Commercial Vacant Land, Land Development, and Residential Construction [Member] | Grades 1-4 [Member]
Loans by credit quality indicators
Total loans	10,645,000	9,539,000
Commercial Vacant Land, Land Development, and Residential Construction [Member] | Grades 5-7 [Member]
Loans by credit quality indicators
Total loans	43,223,000	46,454,000
Commercial Vacant Land, Land Development, and Residential Construction [Member] | Grades 8-9 [Member]
Loans by credit quality indicators
Total loans	4,906,000	7,474,000
Commercial Real Estate - Owner Occupied [Member]
Loans by credit quality indicators
Total loans	276,361,000	264,426,000
Commercial Real Estate - Owner Occupied [Member] | Grades 1-4 [Member]
Loans by credit quality indicators
Total loans	164,083,000	143,075,000
Commercial Real Estate - Owner Occupied [Member] | Grades 5-7 [Member]
Loans by credit quality indicators
Total loans	99,216,000	110,413,000
Commercial Real Estate - Owner Occupied [Member] | Grades 8-9 [Member]
Loans by credit quality indicators
Total loans	13,062,000	10,938,000
Commercial Real Estate - Non-Owner Occupied [Member]
Loans by credit quality indicators
Total loans	318,476,000	334,165,000
Commercial Real Estate - Non-Owner Occupied [Member] | Grades 1-4 [Member]
Loans by credit quality indicators
Total loans	137,302,000	123,048,000
Commercial Real Estate - Non-Owner Occupied [Member] | Grades 5-7 [Member]
Loans by credit quality indicators
Total loans	139,841,000	164,049,000
Commercial Real Estate - Non-Owner Occupied [Member] | Grades 8-9 [Member]
Loans by credit quality indicators
Total loans	41,333,000	47,068,000
Commercial Real Estate - Multi-Family and Residential Rental [Member]
Loans by credit quality indicators
Total loans	56,452,000	68,299,000
Commercial Real Estate - Multi-Family and Residential Rental [Member] | Grades 1-4 [Member]
Loans by credit quality indicators
Total loans	24,327,000	27,245,000
Commercial Real Estate - Multi-Family and Residential Rental [Member] | Grades 5-7 [Member]
Loans by credit quality indicators
Total loans	28,446,000	26,278,000
Commercial Real Estate - Multi-Family and Residential Rental [Member] | Grades 8-9 [Member]
Loans by credit quality indicators
Total loans	3,679,000	14,776,000
Retail Home Equity and Other [Member]
Loans by credit quality indicators
Total loans	40,883,000	42,336,000
Retail 1-4 Family Mortgages [Member]
Loans by credit quality indicators
Total loans	$ 32,622,000	$ 33,181,000