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 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Schedule of Available-for-sale Securities [Line Items]        
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds $ 189,704   $ 986,357  
Available-for-sale Securities, Gross Realized Gains (Losses), Amortized Cost Sold 137,265   914,989  
Available-for-sale Securities, Gross Realized Gains 52,439 560 75,665 11,663
Available-for-sale Securities, Gross Realized Losses (1) (1,629) (4,297) (1,629)
Available-for-sale Securities, Gross Realized Gain (Loss) $ 52,438 $ (1,069) $ 71,368 $ 10,034