Fair Value (Details Textual) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Valuation allowance for impaired loans	$ 5,610,000	$ 5,610,000	$ 7,609,000
Provision for impaired loan losses	(200,000)	(2,200,000)	(4,200,000)
Other real estate owned	9,249,000	9,249,000	7,722,000
Collateral securing loan,net operating income		9.50%
Impaired Loans
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	3,900,000	3,900,000
Impaired Loans | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	17,324,000	17,324,000	26,000,000
Valuation allowance for impaired loans	5,600,000	5,600,000	7,600,000
Other Real Estate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Real estate, other deductions		1,300,000	234,000
Other Real Estate | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value	9,249,000	9,249,000
Other real estate owned	$ 9,200,000	$ 9,200,000	$ 7,700,000