Quarterly report pursuant to Section 13 or 15(d)

Available-for-Sale Securities, at Fair Value Other than Temporary Impairment, Credit Losses Recognized in Earnings (Details)

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Available-for-Sale Securities, at Fair Value Other than Temporary Impairment, Credit Losses Recognized in Earnings (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
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 $ 0 $ (212) $ (1,662)
Other than Temporary Impairment Losses, Investments, Number, Available-for-sale Securities     3 4
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Market Value 162,619   162,619  
Available-for-sale Securities, Weighted Average Cumulative Losses     10.60%  
Available-for-sale Securities, Weighted Average Three-Month Prepayment Speed     0.038  
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized in Earnings, Net, Qualitative Disclosures, Delinquency Rate     29.50%  
Available-for-sale Securities, Weighted Average FICO Score     664  
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Beginning Balance (8,061) (15,046) (9,467) (15,561)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment 0 0 (91) 0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses 0 0 (121) (1,662)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Cash Flows 0 1,446 464 1,677
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold 0 406 1,154 2,352
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Ending Balance $ (8,061) $ (13,194) $ (8,061) $ (13,194)