Quarterly report pursuant to Section 13 or 15(d)

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

v2.4.0.6
Available-for-Sale Securities, at Fair Value Schedule of Realized Gain (Loss) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds $ 796,653 $ 170,102
Available-for-sale Securities, Gross Realized Gains (Losses), Amortized Cost Sold 777,723 158,999
Available-for-sale Securities, Gross Realized Gains 23,226 11,103
Available-for-sale Securities, Gross Realized Losses (4,296) 0
Available-for-sale Securities, Gross Realized Gain (Loss) $ 18,930 $ 11,103