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
Mar. 31, 2014
Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale securities, at fair value $ 12,634,056 $ 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 12,098,833 11,919,590
Available-for-sale Securities, Unamortized Premium 641,697 621,279
Available-for-sale Securities, Designated Credit Reserve 0 0
Available-for-sale Securities, Net, Unamortized (2,895,960) (2,897,222)
Available-for-sale Securities, Amortized Cost Basis 9,844,570 9,643,647
Available-for-sale Securities, Unrealized Gains 131,767 102,600
Available-for-sale Securities, Gross Unrealized Losses (152,412) (248,838)
Available-for-sale securities, at fair value 9,823,925 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 4,423,616 4,474,353
Available-for-sale Securities, Unamortized Premium 0 0
Available-for-sale Securities, Designated Credit Reserve (1,196,798) (1,234,449)
Available-for-sale Securities, Net, Unamortized (1,063,802) (1,071,559)
Available-for-sale Securities, Amortized Cost Basis 2,163,016 2,168,345
Available-for-sale Securities, Unrealized Gains 650,533 595,179
Available-for-sale Securities, Gross Unrealized Losses (3,418) (4,206)
Available-for-sale securities, at fair value 2,810,131 2,759,318
Collateralized Mortgage Backed Securities [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Face Value 16,522,449 16,393,943
Available-for-sale Securities, Unamortized Premium 641,697 621,279
Available-for-sale Securities, Designated Credit Reserve (1,196,798) (1,234,449)
Available-for-sale Securities, Net, Unamortized (3,959,762) (3,968,781)
Available-for-sale Securities, Amortized Cost Basis 12,007,586 11,811,992
Available-for-sale Securities, Unrealized Gains 782,300 697,779
Available-for-sale Securities, Gross Unrealized Losses (155,830) (253,044)
Available-for-sale securities, at fair value $ 12,634,056 $ 12,256,727