Annual report pursuant to Section 13 and 15(d)

Trading Securities, at Fair Value (Details)

v2.4.0.8
Trading Securities, at Fair Value (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Schedule of Trading Securities and Other Trading Assets [Line Items]      
Trading Securities, Cost $ 996,121 $ 997,013  
Trading securities, at fair value 1,000,180 1,002,062  
Trading Securities, Gross Unrealized Gain (Loss) 4,059 5,048  
Proceeds from sales of trading securities 1,000,946 1,001,904 1,222,959
Trading Securities, Amortized Cost Sold 997,899 1,000,207 1,219,636
Trading Securities, Realized Gain (Loss) 3,047 1,697 3,324
Trading Securities, Change in Unrealized Holding Gain (Loss) (990) 1,996 3,529
Assets Sold under Agreements to Repurchase, Market Value 13,950,459 14,287,224  
US Treasury Securities [Member]
     
Schedule of Trading Securities and Other Trading Assets [Line Items]      
Assets Sold under Agreements to Repurchase, Market Value $ 1,000,180 $ 1,002,062