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Securities, at Fair Value (Tables) | 12 Months Ended
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Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract] |
Schedule of information about MBS and CRT Securities | The following tables present certain information about the Company’s residential mortgage securities at December 31, 2021 and 2020: December 31, 2021
(In Thousands) |  | Principal/ Current Face |  | Purchase Premiums |  | Accretable Purchase Discounts |  | Discount Designated as Credit Reserve (1) |  | Gross Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Net Unrealized Gain/(Loss) |  | Fair Value
Total residential mortgage securities (2)(3)(4) |  | $ | 99,999 |  |  | $ | 7,466 |  |  | $ | (55) |  |  | $ | (20,768) |  |  | $ | 86,642 |  |  | $ | 16,282 |  |  | $ | (10) |  |  | $ | 16,272 |  |  | $ | 102,914 |
December 31, 2020
(In Thousands) |  | Principal/ Current Face |  | Purchase Premiums |  | Accretable Purchase Discounts |  | Discount Designated as Credit Reserve (1) |  | Gross Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Net Unrealized Gain/(Loss) |  | Fair Value
Total residential mortgage securities (2)(3)(4)(5) |  | $ | 161,878 |  |  | $ | 3,022 |  |  | $ | (8,206) |  |  | $ | (21,437) |  |  | $ | 135,257 |  |  | $ | 26,926 |  |  | $ | (1,183) |  |  | $ | 25,743 |  |  | $ | 161,000 |
(1)Discount designated as Credit Reserve is generally not expected to be accreted into interest income. (2)Based on management’s current estimates of future principal cash flows expected to be received. (3)At December 31, 2020, the Company expected to recover approximately 99% of the then-current face amount of Non-Agency MBS. (4)Amounts disclosed at December 31, 2021 includes CRT securities with a fair value of $67.5 million for which the fair value option has been elected. Such securities had $1.8 million gross unrealized gains and gross unrealized losses of approximately $10,000 at December 31, 2021. Amounts disclosed at December 31, 2020 includes CRT securities with a fair value of $66.2 million for which the fair value option has been elected. Such securities had gross unrealized gains of approximately $551,000 and gross unrealized losses of approximately $322,000 at December 31, 2020. (5)Includes RPL/NPL MBS, which at December 31, 2020 had a $55.0 million Principal/Current face, $46.9 million amortized cost and $53.9 million fair value.
Schedule of Sale of Residential Mortgage Securities | The following table presents information about the Company’s sales of its residential mortgage securities for the years ended December 31, 2021, 2020 and 2019. The Company has no continuing involvement with any of the sold securities.
|  | For the Year Ended December 31,
|  | 2021 |  | 2020 |  | 2019
(In Thousands) |  | Sales Proceeds |  | Gains/(Losses) |  | Sales Proceeds |  | Gains/(Losses) |  | Sales Proceeds |  | Gains/(Losses)
Agency MBS |  | $ | — |  |  | $ | — |  |  | $ | 1,500,875 |  |  | $ | (19,291) |  |  | $ | 360,634 |  |  | $ | 499 |
Non-Agency MBS |  | — |  |  | — |  |  | 1,318,958 |  |  | 107,999 |  |  | 291,391 |  |  | 50,360 |
CRT Securities |  | — |  |  | — |  |  | 243,025 |  |  | (27,011) |  |  | 256,671 |  |  | 11,143 |
Total |  | $ | — |  |  | $ | — |  |  | $ | 3,062,858 |  |  | $ | 61,697 |  |  | $ | 908,696 |  |  | $ | 62,002 |
Schedule of Credit Losses | The following table presents a roll-forward of the allowance for credit losses on the Company’s Residential mortgage securities and MSR-related assets:
|  | For the Year Ended December 31,
(Dollars In Thousands) |  | 2021 |  | 2020
Allowance for credit losses at beginning of period |  | $ | — |  |  | $ | — |
Current provision: |  | — |  |  | — |
Securities with no prior loss allowance |  | — |  |  | 344,269 |
Securities with a prior loss allowance |  | — |  |  | — |
Write-offs, including allowance related to securities the Company intended to sell |  | — |  |  | (344,269) |
Allowance for credit losses at end of period |  | $ | — |  |  | $ | — |
Schedule of impact of AFS on AOCI | The following table presents the impact of the Company’s AFS securities on its AOCI for the years ended December 31, 2021, 2020, and 2019:
|  | For the Year Ended December 31,
(In Thousands) |  | 2021 |  | 2020 |  | 2019
AOCI from AFS securities: |  |  |  |  |  |
Unrealized gain on AFS securities at beginning of period |  | $ | 79,607 |  |  | $ | 392,722 |  |  | $ | 417,167 |
Unrealized (losses)/gains on securities available-for-sale |  | (32,774) |  |  | 420,281 |  |  | 20,335 |
Reclassification adjustment for MBS sales included in net income |  | — |  |  | (389,127) |  |  | (44,600) |
Reclassification adjustment for impairment included in net income |  | — |  |  | (344,269) |  |  | (180) |
Change in AOCI from AFS securities |  | (32,774) |  |  | (313,115) |  |  | (24,445) |
Balance at end of period |  | $ | 46,833 |  |  | $ | 79,607 |  |  | $ | 392,722 |
Schedule of interest income on MBS, CRT Securities and MSR Related Assets | The following table presents the components of interest income on the Company’s Securities, at fair value for the years ended December 31, 2021, 2020 and 2019:
|  | For the Year Ended December 31,
(In Thousands) |  | 2021 |  | 2020 |  | 2019
Agency MBS |  |  |  |  |  |
Coupon interest |  | $ | — |  |  | $ | 14,038 |  |  | $ | 82,446 |
Effective yield adjustment (1) |  | — |  |  | (5,186) |  |  | (26,545) |
Interest income |  | $ | — |  |  | $ | 8,852 |  |  | $ | 55,901 |
Legacy Non-Agency MBS |  |  |  |  |  |
Coupon interest |  | $ | 14 |  |  | $ | 18,263 |  |  | $ | 87,024 |
Effective yield adjustment (2)(3) |  | 670 |  |  | 10,565 |  |  | 59,622 |
Interest income |  | $ | 684 |  |  | $ | 28,828 |  |  | $ | 146,646 |
RPL/NPL MBS |  |  |  |  |  |
Coupon interest |  | $ | 373 |  |  | $ | 8,376 |  |  | $ | 53,086 |
Effective yield adjustment (1)(4) |  | 8,136 |  |  | 560 |  |  | 338 |
Interest income |  | $ | 8,509 |  |  | $ | 8,936 |  |  | $ | 53,424 |
CRT securities |  |  |  |  |  |
Coupon interest |  | $ | 3,690 |  |  | $ | 7,010 |  |  | $ | 20,532 |
Effective yield adjustment (2) |  | 4,459 |  |  | 511 |  |  | (1,949) |
Interest income |  | $ | 8,149 |  |  | $ | 7,521 |  |  | $ | 18,583 |
MSR-related assets |  |  |  |  |  |
Coupon interest |  | $ | 7,462 |  |  | $ | 25,970 |  |  | $ | 52,644 |
Effective yield adjustment (1)(2)(5) |  | 31,886 |  |  | 9,987 |  |  | 3 |
Interest income |  | $ | 39,348 |  |  | $ | 35,957 |  |  | $ | 52,647 |
(1)Includes amortization of premium paid net of accretion of purchase discount. For Agency MBS, RPL/NPL MBS and the corporate loan secured by MSRs, interest income is recorded at an effective yield, which reflects net premium amortization/accretion based on actual prepayment activity. (2)The effective yield adjustment is the difference between the net income calculated using the net yield less the current coupon yield. The net yield may be based on management’s estimates of the amount and timing of future cash flows or in the instrument’s contractual cash flows, depending on the relevant accounting standards. (3)Includes accretion income recognized due to the impact of redemptions of certain securities that had been previously purchased at a discount of $670,000 and $14.5 million during the years ended December 31, 2021 and 2019, respectively. (4)Includes accretion income recognized due to the impact of redemptions of certain securities that had been previously purchased at a discount of $8.1 million and $329,000 during the years ended December 31, 2021 and 2019, respectively. (5)Includes $20.5 million of accretion income recognized during the year ended December 31, 2021 due to the impact of the redemption at par of MSR-related assets that had been held at amortized cost basis below par due to an impairment charge recorded in the first quarter of 2020.

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