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)

v3.19.1
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
 3 Months Ended
Mar. 31, 2019
Mar. 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 80,128 73,882
Accretion of net discount 0 0
Realized credit losses 4,827 5,482
Reclassification adjustment for other-than-temporary impairments (2,337) 94
Transfers from (to) (3,732) (10,090)
Sales, calls, other (1,741) 0
Total discount/premium on available-for-sale securities, ending balance 1,393,735 712,017
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 (16,434) 3,733
Accretion of net discount (14,225) (22,154)
Realized credit losses 0 0
Reclassification adjustment for other-than-temporary impairments 0 0
Transfers from (to) 3,732 10,090
Sales, calls, other 90,669 18,430
Total discount/premium on available-for-sale securities, ending balance 485,995 580,848
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 63,694 77,615
Accretion of net discount (14,225) (22,154)
Realized credit losses 4,827 5,482
Reclassification adjustment for other-than-temporary impairments (2,337) 94
Transfers from (to) 0 0
Sales, calls, other 88,928 18,430
Total discount/premium on available-for-sale securities, ending balance $ 1,879,730 $ 1,292,865