Fair Value (Details Textual) (USD $)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Valuation allowance for impaired loans	$ 6,157,000	$ 6,157,000	$ 7,609,000
Provision for impaired loan losses	600,000	2,400,000	4,200,000
Other Real Estate	9,336,000	9,336,000	7,722,000
Collateral securing loan,net operating income		9.50%
Other Real Estate
Real Estate, Other Deductions		232,000	234,000
Other Real Estate | Level 3
Fair Value	9,336,000	9,336,000
Other Real Estate	9,300,000	9,300,000	7,700,000
Impaired Loans
Fair Value	3,900,000	3,900,000
Impaired Loans | Level 3
Fair Value	21,060,000	21,060,000	26,000,000
Valuation allowance for impaired loans	$ 6,200,000	$ 6,200,000	$ 7,600,000
Maximum [Member]
Range of Inputs		20.00%
Maximum [Member] | Other Real Estate | Level 3
Range of Inputs		20.00%
Maximum [Member] | Impaired Loans | Level 3
Range of Inputs		50.00%
Minimum [Member]
Range of Inputs		5.00%
Minimum [Member] | Other Real Estate | Level 3
Range of Inputs		5.00%
Minimum [Member] | Impaired Loans | Level 3
Range of Inputs		0.00%