Annual report pursuant to Section 13 and 15(d)

Schedule of Available-for-sale Securities Reconciliation, Non-Agency Unamortized Net Discount and Designated Credit Reserves (Details)

v3.19.3.a.u2
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
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Debt Securities, Available-for-sale, Designated Credit Reserve [Member]    
Debt Securities, Available-for-sale, Unamortized Discount [Roll Forward]    
Total discount/premium on available-for-sale securities, beginning balance $ 1,322,762 $ 653,613
Acquisitions 568,146 737,765
Accretion of net discount 0 0
Realized credit losses 23,517 26,457
Reclassification adjustment for other-than-temporary impairments (10,155) (470)
Transfers from (to) (140,703) (42,629)
Sales, calls, other 24,892 0
Total discount/premium on available-for-sale securities, ending balance 1,711,951 1,322,762
Debt Securities, Available-for-sale, Net Unamortized Discount/Premium [Member]    
Debt Securities, Available-for-sale, Unamortized Discount [Roll Forward]    
Total discount/premium on available-for-sale securities, beginning balance 603,591 607,609
Acquisitions (2,472) 60,894
Accretion of net discount 43,674 89,111
Realized credit losses 0 0
Reclassification adjustment for other-than-temporary impairments 0 0
Transfers from (to) 140,703 42,629
Sales, calls, other 226,923 18,430
Total discount/premium on available-for-sale securities, ending balance 471,225 603,591
Debt Securities, Available-for-sale, Total Discount/Premium [Member]    
Debt Securities, Available-for-sale, Unamortized Discount [Roll Forward]    
Total discount/premium on available-for-sale securities, beginning balance 1,926,353 1,261,222
Acquisitions 565,674 798,659
Accretion of net discount 43,674 89,111
Realized credit losses 23,517 26,457
Reclassification adjustment for other-than-temporary impairments (10,155) (470)
Transfers from (to) 0 0
Sales, calls, other 251,815 18,430
Total discount/premium on available-for-sale securities, ending balance $ 2,183,176 $ 1,926,353