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 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Schedule of Trading Securities and Other Trading Assets [Line Items]          
Trading Securities, Cost $ 996,851   $ 996,851   $ 996,121
Trading securities, at fair value 1,002,422   1,002,422   1,000,180
Trading Securities, Gross Unrealized Gain (Loss) 5,571   5,571   4,059
Proceeds from sales of trading securities 44,796   143,378 0  
Trading Securities, Amortized Cost Sold 44,803   143,023    
Trading Securities, Realized Gain (Loss) (7)   355    
Trading Securities, Change in Unrealized Holding Gain (Loss) 1,741 (1,575) 1,512 (1,558)  
Assets Sold under Agreements to Repurchase, Market Value 12,997,831   12,997,831   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 $ 1,002,422   $ 1,002,422   $ 1,000,180