Annual report pursuant to Section 13 and 15(d)

Fair Values of Financial Instruments (Details Textual)

v2.4.0.6
Fair Values of Financial Instruments (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Other than Temporary Impairment, Additional $ 6,200  
Minimum Percentage of Defaults Rates on Above 3 Years Issuer Average in Other han Temporary Impairment Model Assumptions 0.25%  
Maximum Percentage of Defaults Rates on Above 3 Years Issuer Average in Other than Temporary Impairment Model Assumptions 5.00%  
Minimum Percentage of Recovery Assumptions on Other than Temporary Impairment Model Assumptions 0.00%  
Maximum Percentage of Recovery Assumptions on Other than Temporary Impairment Model Assumptions 15.00%  
Available-for-sale Securities, Amortized Cost Basis 3,900,000  
Impaired Financing Receivable, Unpaid Principal Balance 19,900,000 21,700,000
Impaired Financing Receivable, Reserve 2,000,000 1,600,000
Impaired Financing Receivable, Fair Value $ 17,900,000 $ 20,100,000