Quarterly report pursuant to Section 13 or 15(d)

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

v2.4.1.9
Available-for-Sale Securities, at Fair Value Schedule of Realized Gain (Loss) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds $ 900,106us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds $ 814,872us-gaap_AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds
Available-for-sale Securities, Gross Realized Gains (Losses), Amortized Cost Sold 782,639two_AvailableForSaleSecuritiesGrossRealizedGainsLossesAmortizedCostSold 853,661two_AvailableForSaleSecuritiesGrossRealizedGainsLossesAmortizedCostSold
Available-for-sale Securities, Gross Realized Gains 117,688us-gaap_AvailableForSaleSecuritiesGrossRealizedGains 7,209us-gaap_AvailableForSaleSecuritiesGrossRealizedGains
Available-for-sale Securities, Gross Realized Losses (220)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses (45,997)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses
Available-for-sale Securities, Gross Realized Gain (Loss) $ 117,468us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet $ (38,788)us-gaap_AvailableForSaleSecuritiesGrossRealizedGainLossNet