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)

v3.5.0.2
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, 2016
Sep. 30, 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 (45,398) (274)
Available-for-sale Securities, Unamortized Discount, Accretion 0 0
Available-for-sale Securities, Unamortized Discount, Credit Losses 279 13,376
Available-for-sale Securities, Unamortized Discount, Other-than-temporary Impairment Adjustment (1,226) 1,742
Available-for-sale Securities, Unamortized Discount, Transfers 70,371 85,767
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 32,562 (282,821)
Available-for-sale Securities, Unamortized Discount, Ending Balance (352,489) (544,173)
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 (140,318) (4,293)
Available-for-sale Securities, Unamortized Discount, Accretion 50,596 76,861
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 (70,371) (85,767)
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 77,689 (227,078)
Available-for-sale Securities, Unamortized Discount, Ending Balance (789,425) (753,489)
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 (185,716) (4,567)
Available-for-sale Securities, Unamortized Discount, Accretion 50,596 76,861
Available-for-sale Securities, Unamortized Discount, Credit Losses 279 13,376
Available-for-sale Securities, Unamortized Discount, Other-than-temporary Impairment Adjustment (1,226) 1,742
Available-for-sale Securities, Unamortized Discount, Transfers 0 0
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other (110,251) (509,899)
Available-for-sale Securities, Unamortized Discount, Ending Balance $ (1,141,914) $ (1,297,662)