Quarterly report pursuant to Section 13 or 15(d)

Trading Securities, at Fair Value (Details)

v2.4.0.8
Trading Securities, at Fair Value (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Schedule of Trading Securities and Other Trading Assets [Line Items]          
Trading Securities, Cost $ 1,995,925   $ 1,995,925   $ 996,121
Trading securities, at fair value 1,993,124   1,993,124   1,000,180
Trading Securities, Gross Unrealized Gain (Loss) (2,801)   (2,801)   4,059
Proceeds from sales of trading securities 1,002,031 1,000,946 1,145,410 1,000,946  
Trading Securities, Amortized Cost Sold 996,908 997,899 1,139,932 997,899  
Trading Securities, Realized Gain (Loss) 5,123 3,047 5,478 3,047  
Trading Securities, Change in Unrealized Holding Gain (Loss) (8,372) 1,380 (6,860) (179)  
Assets Sold under Agreements to Repurchase, Market Value 13,817,472   13,817,472   13,950,459
US Treasury Securities [Member]
          
Schedule of Trading Securities and Other Trading Assets [Line Items]          
Assets Sold under Agreements to Repurchase, Market Value $ 1,993,124   $ 1,993,124   $ 1,000,180