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)

v3.19.3
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
 9 Months Ended
Sep. 30, 2019
Sep. 30, 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 471,746 606,728
Accretion of net discount 0 0
Realized credit losses 18,668 20,983
Reclassification adjustment for other-than-temporary impairments (6,847) (363)
Transfers from (to) (34,157) (44,972)
Sales, calls, other 24,892 0
Total discount/premium on available-for-sale securities, ending balance 1,723,638 1,194,749
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 (10,524) 37,924
Accretion of net discount (27,782) (64,538)
Realized credit losses 0 0
Reclassification adjustment for other-than-temporary impairments 0 0
Transfers from (to) 34,157 44,972
Sales, calls, other 226,923 18,430
Total discount/premium on available-for-sale securities, ending balance 372,519 607,537
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 461,222 644,652
Accretion of net discount (27,782) (64,538)
Realized credit losses 18,668 20,983
Reclassification adjustment for other-than-temporary impairments (6,847) (363)
Transfers from (to) 0 0
Sales, calls, other 251,815 18,430
Total discount/premium on available-for-sale securities, ending balance $ 2,096,157 $ 1,802,286