Quarterly report pursuant to Section 13 or 15(d)

Schedule of Available-for-sale Securities Reconciliation (Details)

v3.22.1
Schedule of Available-for-sale Securities Reconciliation (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Jan. 01, 2020
Debt Securities, Available-for-sale [Line Items]        
Principal/Current Face $ 10,514,385 $ 11,550,625    
Unamortized Premium 464,482 592,809    
Accretable Purchase Discount (37) (39)    
Amortized Cost 7,139,506 7,005,013    
Allowance for Credit Losses (11,573) (14,238) $ (18,170) $ (22,528)
Unrealized Gain 39,232 192,040    
Unrealized Loss (196,447) (21,112)    
Available-for-sale securities, at fair value 6,970,718 7,161,703    
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]        
Debt Securities, Available-for-sale [Line Items]        
Principal/Current Face 8,691,283 9,609,810    
Unamortized Premium 448,712 576,276    
Accretable Purchase Discount (12) (12)    
Amortized Cost 7,122,987 6,987,627    
Allowance for Credit Losses (11,567) (12,851) (16,699) (17,889)
Unrealized Gain 38,928 192,007    
Unrealized Loss (192,160) (17,384)    
Available-for-sale securities, at fair value 6,958,188 7,149,399    
Mortgage-backed Securities, Issued by Private Enterprises [Member]        
Debt Securities, Available-for-sale [Line Items]        
Principal/Current Face 1,823,102 1,940,815    
Unamortized Premium 15,770 16,533    
Accretable Purchase Discount (25) (27)    
Amortized Cost 16,519 17,386    
Allowance for Credit Losses (6) (1,387) $ (1,471) $ (4,639)
Unrealized Gain 304 33    
Unrealized Loss (4,287) (3,728)    
Available-for-sale securities, at fair value 12,530 12,304    
Fixed Income Securities [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]        
Debt Securities, Available-for-sale [Line Items]        
Principal/Current Face 6,674,287 6,411,363    
Unamortized Premium 291,087 270,699    
Accretable Purchase Discount (12) (12)    
Amortized Cost 6,965,362 6,682,050    
Allowance for Credit Losses 0 0    
Unrealized Gain 21,881 171,308    
Unrealized Loss (186,039) (4,855)    
Available-for-sale securities, at fair value 6,801,204 6,848,503    
Interest-Only-Strip [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]        
Debt Securities, Available-for-sale [Line Items]        
Principal/Current Face 2,016,996 3,198,447    
Unamortized Premium 157,625 305,577    
Accretable Purchase Discount 0 0    
Amortized Cost 157,625 305,577    
Allowance for Credit Losses (11,567) (12,851)    
Unrealized Gain 17,047 20,699    
Unrealized Loss (6,121) (12,529)    
Available-for-sale securities, at fair value $ 156,984 $ 300,896