Quarterly report pursuant to Section 13 or 15(d)

Available-for-Sale Securities, at Fair Value Schedule of Realized Gain (Loss) (Details)

v2.4.0.8
Available-for-Sale Securities, at Fair Value Schedule of Realized Gain (Loss) (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
Schedule of Available-for-sale Securities [Line Items]        
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds $ 3,070,334   $ 4,056,691  
Available-for-sale Securities, Gross Realized Gains (Losses), Amortized Cost Sold 3,304,872   4,219,860  
Available-for-sale Securities, Gross Realized Gains 27,786 0 103,451 11,663
Available-for-sale Securities, Gross Realized Losses (262,323) (221) (266,620) (1,850)
Available-for-sale Securities, Gross Realized Gain (Loss) $ (234,537) $ (221) $ (163,169) $ 9,813