Annual report pursuant to Section 13 and 15(d)

Available-for-sale Securities, Rollforward of the Allowance for Credit Losses (Details)

v3.20.4
Available-for-sale Securities, Rollforward of the Allowance for Credit Losses (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]  
Allowance for credit losses at beginning of period $ 0
Additions on securities for which credit losses were not previously recorded (44,359)
Additions arising from purchases of securities accounted for as purchased credit deteriorated 0
Reductions for securities sold 246,792
Reductions due to the intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost 0
Increase (decrease) on securities with previously recorded credit losses (14,081)
Writeoffs 36,531
Recoveries of amounts previously written off (2,535)
Allowance for credit losses at end of period (22,528)
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]  
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]  
Additions on securities for which credit losses were not previously recorded 32,931
Additions arising from purchases of securities accounted for as purchased credit deteriorated 0
Reductions for securities sold 0
Reductions due to the intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost 0
Increase (decrease) on securities with previously recorded credit losses (385)
Writeoffs (14,657)
Recoveries of amounts previously written off 0
Allowance for credit losses at end of period (17,889)
Mortgage-backed Securities, Issued by Private Enterprises [Member]  
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]  
Additions on securities for which credit losses were not previously recorded 11,428
Additions arising from purchases of securities accounted for as purchased credit deteriorated 0
Reductions for securities sold (246,792)
Reductions due to the intent to sell or more likely than not will be required to sell the security before recovery of its amortized cost 0
Increase (decrease) on securities with previously recorded credit losses 14,466
Writeoffs (21,874)
Recoveries of amounts previously written off 2,535
Allowance for credit losses at end of period $ (4,639)