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)

v3.19.2
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, 2019
Jun. 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 336,914 310,985
Accretion of net discount 0 0
Realized credit losses 12,353 14,810
Reclassification adjustment for other-than-temporary impairments (2,511) (268)
Transfers from (to) (11,520) (26,222)
Sales, calls, other (1,741) 0
Total discount/premium on available-for-sale securities, ending balance 1,640,055 923,834
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 (5,911) 14,025
Accretion of net discount (23,822) (44,611)
Realized credit losses 0 0
Reclassification adjustment for other-than-temporary impairments 0 0
Transfers from (to) 11,520 26,222
Sales, calls, other 90,669 18,430
Total discount/premium on available-for-sale securities, ending balance 494,709 584,815
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 331,003 325,010
Accretion of net discount (23,822) (44,611)
Realized credit losses 12,353 14,810
Reclassification adjustment for other-than-temporary impairments (2,511) (268)
Transfers from (to) 0 0
Sales, calls, other 88,928 18,430
Total discount/premium on available-for-sale securities, ending balance $ 2,134,764 $ 1,508,649