Quarterly report pursuant to Section 13 or 15(d)

Fair Value (Details Textual)

v2.4.0.6
Fair Value (Details Textual) (USD $)
In Millions, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Minimum Percentage of Defaults Rates on Above 3 Years Issuer Average in Other Than 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 $ 3.9  
Impaired Financing Receivable, Unpaid Principal Balance 18.9 21.7
Impaired Financing Receivable, Reserve 1.7 1.6
Impaired Financing Receivable, Fair Value $ 17.2 $ 20.1