Quarterly report pursuant to Section 13 or 15(d)

Schedule of Available-for-sale Securities Reconciliation (Details)

v2.4.0.8
Schedule of Available-for-sale Securities Reconciliation (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Face Value $ 16,355,797 $ 16,393,943
Available-for-sale Securities, Unamortized Premium 626,470 621,279
Available-for-sale Securities, Designated Credit Reserve (969,031) (1,234,449)
Available-for-sale Securities, Net, Unamortized (4,091,976) (3,968,781)
Available-for-sale Securities, Amortized Cost Basis 11,921,260 11,811,992
Available-for-sale Securities, Gross Unrealized Gains 843,052 697,779
Available-for-sale Securities, Gross Unrealized Losses (66,404) (253,044)
Available-for-sale securities, at fair value 12,697,908 12,256,727
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Face Value 12,040,854 11,919,590
Available-for-sale Securities, Unamortized Premium 626,470 621,279
Available-for-sale Securities, Designated Credit Reserve 0 0
Available-for-sale Securities, Net, Unamortized (3,072,511) (2,897,222)
Available-for-sale Securities, Amortized Cost Basis 9,594,813 9,643,647
Available-for-sale Securities, Gross Unrealized Gains 168,871 102,600
Available-for-sale Securities, Gross Unrealized Losses (65,272) (248,838)
Available-for-sale securities, at fair value 9,698,412 9,497,409
Mortgage-backed Securities, Issued by Private Enterprises [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Face Value 4,314,943 4,474,353
Available-for-sale Securities, Unamortized Premium 0 0
Available-for-sale Securities, Designated Credit Reserve (969,031) (1,234,449)
Available-for-sale Securities, Net, Unamortized (1,019,465) (1,071,559)
Available-for-sale Securities, Amortized Cost Basis 2,326,447 2,168,345
Available-for-sale Securities, Gross Unrealized Gains 674,181 595,179
Available-for-sale Securities, Gross Unrealized Losses (1,132) (4,206)
Available-for-sale securities, at fair value $ 2,999,496 $ 2,759,318