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)

v3.4.0.3
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
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Available-for-sale Securities, Designated Credit Reserve [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Unamortized Discount, Beginning Balance $ (409,077) $ (927,605)
Available-for-sale Securities, Unamortized Discount, Acquisitions 1,013 1,183
Available-for-sale Securities, Unamortized Discount, Accretion 0 0
Available-for-sale Securities, Unamortized Discount, Credit Losses 3,093 3,727
Available-for-sale Securities, Unamortized Discount, Other-than-temporary Impairment Adjustment (121) 1,789
Available-for-sale Securities, Unamortized Discount, Transfers 19,454 41,092
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 32,562 132,430
Available-for-sale Securities, Unamortized Discount, Ending Balance (353,076) (747,384)
Available-for-sale Securities, Net, Unamortized [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Unamortized Discount, Beginning Balance (707,021) (967,368)
Available-for-sale Securities, Unamortized Discount, Acquisitions 25,222 (935)
Available-for-sale Securities, Unamortized Discount, Accretion 16,760 27,465
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 (19,454) (41,092)
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 55,535 109,947
Available-for-sale Securities, Unamortized Discount, Ending Balance (679,402) (871,983)
Available-for-sale Securities, Unamortized Discount [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Available-for-sale Securities, Unamortized Discount, Beginning Balance (1,116,098) (1,894,973)
Available-for-sale Securities, Unamortized Discount, Acquisitions (24,209) 248
Available-for-sale Securities, Unamortized Discount, Accretion 16,760 27,465
Available-for-sale Securities, Unamortized Discount, Credit Losses 3,093 3,727
Available-for-sale Securities, Unamortized Discount, Other-than-temporary Impairment Adjustment (121) 1,789
Available-for-sale Securities, Unamortized Discount, Transfers 0 0
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 88,097 242,377
Available-for-sale Securities, Unamortized Discount, Ending Balance $ (1,032,478) $ (1,619,367)