Quarterly report pursuant to Section 13 or 15(d)

Schedule of Available-for-sale Securities Reconciliation, Non-Agency Unamortized Net Discount and Designated Credit Reserves (Details)

v2.4.0.8
Schedule of Available-for-sale Securities Reconciliation, Non-Agency Unamortized Net Discount and Designated Credit Reserves (Details) (Mortgage-backed Securities, Issued by Private Enterprises [Member], USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Available-for-sale Securities, Designated Credit Reserve [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Unamortized Discount, Beginning Balance $ (1,234,448) $ (1,290,946)
Available-for-sale Securities, Unamortized Discount, Acquisitions (62,752) (158,955)
Available-for-sale Securities, Unamortized Discount, Accretion 0 886
Available-for-sale Securities, Unamortized Discount, Credit Losses 6,607 22,658
Available-for-sale Securities, Unamortized Discount, Other-than-temporary Impairment Adjustment (212) (1,662)
Available-for-sale Securities, Unamortized Discount, Transfers 47,495 30,883
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 80,853 10,529
Available-for-sale Securities, Unamortized Discount, Ending Balance (1,162,457) (1,386,607)
Available-for-sale Securities, Net, Unamortized [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Unamortized Discount, Beginning Balance (1,071,559) (996,490)
Available-for-sale Securities, Unamortized Discount, Acquisitions (46,581) (365,348)
Available-for-sale Securities, Unamortized Discount, Accretion 64,084 71,625
Available-for-sale Securities, Unamortized Discount, Credit Losses 0 0
Available-for-sale Securities, Unamortized Discount, Other-than-temporary Impairment Adjustment 0 0
Available-for-sale Securities, Unamortized Discount, Transfers (47,495) (30,883)
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 45,251 98,478
Available-for-sale Securities, Unamortized Discount, Ending Balance (1,056,300) (1,222,618)
Available-for-sale Securities, Unamortized Discount [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Unamortized Discount, Beginning Balance (2,306,007) (2,287,436)
Available-for-sale Securities, Unamortized Discount, Acquisitions (109,333) (524,303)
Available-for-sale Securities, Unamortized Discount, Accretion 64,084 72,511
Available-for-sale Securities, Unamortized Discount, Credit Losses 6,607 22,658
Available-for-sale Securities, Unamortized Discount, Other-than-temporary Impairment Adjustment (212) (1,662)
Available-for-sale Securities, Unamortized Discount, Transfers 0 0
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 126,104 109,007
Available-for-sale Securities, Unamortized Discount, Ending Balance $ (2,218,757) $ (2,609,225)