Quarterly report pursuant to Section 13 or 15(d)

Other than Temporary Impairment, Credit Losses Recognized in Earnings (Details)

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Other than Temporary Impairment, Credit Losses Recognized in Earnings (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]        
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities $ 0 $ (559) $ (1,662) $ (9,310)
Other than Temporary Impairment Losses, Investments, Number, Available-for-sale Securities     4 31
Available-for-sale Securities, Weighted Average Cumulative Losses 7.80%   7.80%  
Available-for-sale Securities, Weighted Average Three-Month Prepayment Speed 0.043   0.043  
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized in Earnings, Net, Qualitative Disclosures, Delinquency Rate     34.50%  
Available-for-sale Securities, Weighted Average FICO Score 629   629  
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Beginning Balance (15,046) (13,603) (15,561) (5,102)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment 0 (315) 0 (6,443)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses 0 (244) (1,662) (2,867)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Cash Flows 1,446 0 1,677 250
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold 406 243 2,352 243
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Ending Balance $ (13,194) $ (13,919) $ (13,194) $ (13,919)