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
 6 Months Ended
Jun. 30, 2016
Jun. 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 (16,217) (1,284)
Available-for-sale Securities, Unamortized Discount, Accretion 0 0
Available-for-sale Securities, Unamortized Discount, Credit Losses (2,371) 8,470
Available-for-sale Securities, Unamortized Discount, Other-than-temporary Impairment Adjustment (211) 1,619
Available-for-sale Securities, Unamortized Discount, Transfers 59,453 58,716
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 32,562 202,458
Available-for-sale Securities, Unamortized Discount, Ending Balance (335,861) (657,626)
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 (74,039) (3,283)
Available-for-sale Securities, Unamortized Discount, Accretion 32,287 52,759
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 (59,453) (58,716)
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 67,121 156,584
Available-for-sale Securities, Unamortized Discount, Ending Balance (741,105) (820,024)
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 (90,256) (4,567)
Available-for-sale Securities, Unamortized Discount, Accretion 32,287 52,759
Available-for-sale Securities, Unamortized Discount, Credit Losses (2,371) 8,470
Available-for-sale Securities, Unamortized Discount, Other-than-temporary Impairment Adjustment (211) 1,619
Available-for-sale Securities, Unamortized Discount, Transfers 0 0
Available-for-sale Securities, Unamortized Discount, Sales, Calls and Other 99,683 359,042
Available-for-sale Securities, Unamortized Discount, Ending Balance $ (1,076,966) $ (1,477,650)