Annual report pursuant to Section 13 and 15(d)

Trading Securities, at Fair Value (Details)

v3.3.1.900
Trading Securities, at Fair Value (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Schedule of Trading Securities and Other Trading Assets [Line Items]      
Trading Securities, Cost $ 0 $ 1,996,289  
Trading Securities, Gross Unrealized Gain (Loss) 0 1,367  
Trading securities 0 1,997,656  
Proceeds from sales of trading securities 2,004,375 1,145,410 $ 1,000,946
Trading Securities, Amortized Cost Sold 1,996,951 1,139,932 997,899
Trading Securities, Realized Gain (Loss) 7,424 5,478 3,047
Trading Securities, Change in Unrealized Holding Gain (Loss) $ (1,367) (2,692) $ (990)
Trading Securities Pledged as Collateral   $ 2,000,000