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)

v2.4.0.6
Schedule of Available-for-sale Securities Reconciliation, Non-Agency Unamortized Net Discount and Designated Credit Reserves (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Available-for-sale Securities, Designated Credit Reserve [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Unamortized Discount, Beginning Balance $ (782,606) $ (145,855)
Available-for-sale Securities, Unamortized Discount, Acquisitions (521,424) (96,343)
Available-for-sale Securities, Unamortized Discount, Accretion 0 0
Available-for-sale Securities, Unamortized Discount, Credit Losses 3,309 771
Available-for-sale Securities, Unamortized Discount, Other-than-temporary Impairment Adjustment (4,275) 0
Available-for-sale Securities, Unamortized Discount, Transfers 0 (123)
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 243 8,085
Available-for-sale Securities, Unamortized Discount, Ending Balance (1,304,753) (233,465)
Available-for-sale Securities, Net, Unamortized [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Unamortized Discount, Beginning Balance (540,969) (129,992)
Available-for-sale Securities, Unamortized Discount, Acquisitions (437,331) (38,763)
Available-for-sale Securities, Unamortized Discount, Accretion 28,897 5,376
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 0 123
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 1,030 5,145
Available-for-sale Securities, Unamortized Discount, Ending Balance (948,373) (158,111)
Available-for-sale Securities, Unamortized Discount [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Unamortized Discount, Beginning Balance (1,323,575) (275,847)
Available-for-sale Securities, Unamortized Discount, Acquisitions (958,755) (135,106)
Available-for-sale Securities, Unamortized Discount, Accretion 28,897 5,376
Available-for-sale Securities, Unamortized Discount, Credit Losses 3,309 771
Available-for-sale Securities, Unamortized Discount, Other-than-temporary Impairment Adjustment (4,275) 0
Available-for-sale Securities, Unamortized Discount, Transfers 0 0
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 1,273 13,230
Available-for-sale Securities, Unamortized Discount, Ending Balance $ (2,253,126) $ (391,576)