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)

v3.3.0.814
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
 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Available-for-sale Securities, Designated Credit Reserve [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Unamortized Discount, Beginning Balance $ (927,605) $ (1,234,449)
Available-for-sale Securities, Unamortized Discount, Acquisitions (274) (69,663)
Available-for-sale Securities, Unamortized Discount, Accretion 0 0
Available-for-sale Securities, Unamortized Discount, Credit Losses 13,376 11,325
Available-for-sale Securities, Unamortized Discount, Other-than-temporary Impairment Adjustment 1,742 (212)
Available-for-sale Securities, Unamortized Discount, Transfers 85,767 91,086
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 282,821 232,882
Available-for-sale Securities, Unamortized Discount, Ending Balance (544,173) (969,031)
Available-for-sale Securities, Net, Unamortized [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Unamortized Discount, Beginning Balance (967,368) (1,071,559)
Available-for-sale Securities, Unamortized Discount, Acquisitions 4,293 (57,174)
Available-for-sale Securities, Unamortized Discount, Accretion 76,861 96,873
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 (85,767) (91,086)
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 227,078 103,481
Available-for-sale Securities, Unamortized Discount, Ending Balance (753,489) (1,019,465)
Available-for-sale Securities, Unamortized Discount [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Unamortized Discount, Beginning Balance (1,894,973) (2,306,008)
Available-for-sale Securities, Unamortized Discount, Acquisitions (4,567) (126,837)
Available-for-sale Securities, Unamortized Discount, Accretion 76,861 96,873
Available-for-sale Securities, Unamortized Discount, Credit Losses 13,376 11,325
Available-for-sale Securities, Unamortized Discount, Other-than-temporary Impairment Adjustment 1,742 (212)
Available-for-sale Securities, Unamortized Discount, Transfers 0 0
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 509,899 336,363
Available-for-sale Securities, Unamortized Discount, Ending Balance $ (1,297,662) $ (1,988,496)