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Residential Mortgage Securities and MSR Related Assets (Tables) | 12 Months Ended
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Dec. 31, 2019
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, 2019 and 2018: December 31, 2019
(In Thousands) |  | Principal/ Current Face |  | Purchase Premiums |  | Accretable Purchase Discounts |  | Discount Designated as Credit Reserve and OTTI (1) |  | Amortized Cost (2) |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Net Unrealized Gain/(Loss) |  | Fair Value
Agency MBS: (3) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fannie Mae |  | $ | 1,119,708 |  |  | $ | 43,249 |  |  | $ | (22 | ) |  | $ | — |  |  | $ | 1,162,935 |  |  | $ | 9,799 |  |  | $ | (14,741 | ) |  | $ | (4,942 | ) |  | $ | 1,157,993 |
Freddie Mac |  | 480,879 |  |  | 19,468 |  |  | — |  |  | — |  |  | 500,961 |  |  | 5,475 |  |  | (3,968 | ) |  | 1,507 |  |  | 502,468 |
Ginnie Mae |  | 3,996 |  |  | 73 |  |  | — |  |  | — |  |  | 4,069 |  |  | 52 |  |  | — |  |  | 52 |  |  | 4,121 |
Total Agency MBS |  | 1,604,583 |  |  | 62,790 |  |  | (22 | ) |  | — |  |  | 1,667,965 |  |  | 15,326 |  |  | (18,709 | ) |  | (3,383 | ) |  | 1,664,582 |
Non-Agency MBS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected to Recover Par (4)(5) |  | 722,477 |  |  | — |  |  | (16,661 | ) |  | — |  |  | 705,816 |  |  | 19,861 |  |  | (9 | ) |  | 19,852 |  |  | 725,668 |
Expected to Recover Less than Par (4) |  | 1,472,826 |  |  | — |  |  | (73,956 | ) |  | (436,598 | ) |  | 962,272 |  |  | 375,598 |  |  | (9 | ) |  | 375,589 |  |  | 1,337,861 |
Total Non-Agency MBS (6) |  | 2,195,303 |  |  | — |  |  | (90,617 | ) |  | (436,598 | ) |  | 1,668,088 |  |  | 395,459 |  |  | (18 | ) |  | 395,441 |  |  | 2,063,529 |
Total MBS |  | 3,799,886 |  |  | 62,790 |  |  | (90,639 | ) |  | (436,598 | ) |  | 3,336,053 |  |  | 410,785 |  |  | (18,727 | ) |  | 392,058 |  |  | 3,728,111 |
CRT securities (7) |  | 244,932 |  |  | 4,318 |  |  | (55 | ) |  | — |  |  | 249,195 |  |  | 6,304 |  |  | (91 | ) |  | 6,213 |  |  | 255,408 |
Total MBS and CRT securities |  | $ | 4,044,818 |  |  | $ | 67,108 |  |  | $ | (90,694 | ) |  | $ | (436,598 | ) |  | $ | 3,585,248 |  |  | $ | 417,089 |  |  | $ | (18,818 | ) |  | $ | 398,271 |  |  | $ | 3,983,519 |
December 31, 2018
(In Thousands) |  | Principal/ Current Face |  | Purchase Premiums |  | Accretable Purchase Discounts |  | Discount Designated as Credit Reserve and OTTI (1) |  | Amortized Cost (2) |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Net Unrealized Gain/(Loss) |  | Fair Value
Agency MBS: (3) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fannie Mae |  | $ | 1,716,340 |  |  | $ | 65,930 |  |  | $ | (24 | ) |  | $ | — |  |  | $ | 1,782,246 |  |  | $ | 12,107 |  |  | $ | (32,321 | ) |  | $ | (20,214 | ) |  | $ | 1,762,032 |
Freddie Mac |  | 909,561 |  |  | 36,991 |  |  | — |  |  | — |  |  | 947,588 |  |  | 907 |  |  | (17,177 | ) |  | (16,270 | ) |  | 931,318 |
Ginnie Mae |  | 4,729 |  |  | 87 |  |  | — |  |  | — |  |  | 4,816 |  |  | 47 |  |  | — |  |  | 47 |  |  | 4,863 |
Total Agency MBS |  | 2,630,630 |  |  | 103,008 |  |  | (24 | ) |  | — |  |  | 2,734,650 |  |  | 13,061 |  |  | (49,498 | ) |  | (36,437 | ) |  | 2,698,213 |
Non-Agency MBS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected to Recover Par (4)(5) |  | 1,536,485 |  |  | 40 |  |  | (21,725 | ) |  | — |  |  | 1,514,800 |  |  | 20,520 |  |  | (7,620 | ) |  | 12,900 |  |  | 1,527,700 |
Expected to Recover Less than Par (4) |  | 2,002,319 |  |  | — |  |  | (133,300 | ) |  | (516,116 | ) |  | 1,352,903 |  |  | 438,465 |  |  | (769 | ) |  | 437,696 |  |  | 1,790,599 |
Total Non-Agency MBS (6) |  | 3,538,804 |  |  | 40 |  |  | (155,025 | ) |  | (516,116 | ) |  | 2,867,703 |  |  | 458,985 |  |  | (8,389 | ) |  | 450,596 |  |  | 3,318,299 |
Total MBS |  | 6,169,434 |  |  | 103,048 |  |  | (155,049 | ) |  | (516,116 | ) |  | 5,602,353 |  |  | 472,046 |  |  | (57,887 | ) |  | 414,159 |  |  | 6,016,512 |
CRT securities (7) |  | 476,744 |  |  | 9,321 |  |  | 107 |  |  | — |  |  | 486,172 |  |  | 12,545 |  |  | (5,896 | ) |  | 6,649 |  |  | 492,821 |
Total MBS and CRT securities |  | $ | 6,646,178 |  |  | $ | 112,369 |  |  | $ | (154,942 | ) |  | $ | (516,116 | ) |  | $ | 6,088,525 |  |  | $ | 484,591 |  |  | $ | (63,783 | ) |  | $ | 420,808 |  |  | $ | 6,509,333 |
(1) | Discount designated as Credit Reserve and amounts related to OTTI are generally not expected to be accreted into interest income. Amounts disclosed at December 31, 2019 reflect Credit Reserve of $426.0 million and OTTI of $10.6 million. Amounts disclosed at December 31, 2018 reflect Credit Reserve of $503.3 million and OTTI of $12.8 million.
(2) | Includes principal payments receivable of $614,000 and $1.0 million at December 31, 2019 and 2018, respectively, which are not included in the Principal/Current Face.
(3) | Amounts disclosed at December 31, 2019 and 2018 include Agency MBS with a fair value of $280.3 million and $736.5 million, respectively, for which the fair value option has been elected. Such securities had $4.5 million unrealized gains and no gross unrealized losses at December 31, 2019, and no unrealized gains and gross unrealized losses of approximately $3.3 million at December 31, 2018, respectively.
(4) | Based on management’s current estimates of future principal cash flows expected to be received.
(5) | Includes RPL/NPL MBS, which at December 31, 2019 had a $632.3 million Principal/Current face, $631.8 million amortized cost and $635.0 million fair value. At December 31, 2018, RPL/NPL MBS had a $1.4 billion Principal/Current face, $1.4 billion amortized cost and $1.4 billion fair value.
(6) | At December 31, 2019 and 2018, the Company expected to recover approximately 80% and 85% of the then-current face amount of Non-Agency MBS, respectively.
(7) Amounts disclosed at December 31, 2019 includes CRT securities with a fair value of $255.4 million for which the fair value option has been elected. Such securities had gross unrealized gains of approximately $6.3 million and gross unrealized losses of approximately $91,000 at December 31, 2019. Amounts disclosed at December 31, 2018 includes CRT securities with a fair value of $477.4 million for which the fair value option had been elected. Such securities had gross unrealized gains of approximately $12.5 million and gross unrealized losses of approximately $5.6 million at December 31, 2018.
Schedule of Sale of Residential Mortgage Securities | The following tables present information about the Company’s sales of its residential mortgage securities for the years ended December 31, 2019, 2018 and 2017. The Company has no continuing involvement with any of the sold MBS.
|  | For the Year Ended December 31,
|  | 2019 |  | 2018 |  | 2017
(In Thousands) |  | Sales Proceeds |  | Gains/(Losses) |  | Sales Proceeds |  | Gains/(Losses) |  | Sales Proceeds |  | Gains/(Losses)
Agency MBS |  | $ | 360,634 |  |  | $ | 499 |  |  | $ | 122,027 |  |  | $ | (6,810 | ) |  | $ | — |  |  | $ | — |
Non-Agency MBS |  | 291,391 |  |  | 50,360 |  |  | 117,060 |  |  | 36,744 |  |  | 103,989 |  |  | 39,889 |
CRT Securities |  | 256,671 |  |  | 11,143 |  |  | 299,878 |  |  | 31,373 |  |  | — |  |  | — |
Total |  | $ | 908,696 |  |  | $ | 62,002 |  |  | $ | 538,965 |  |  | $ | 61,307 |  |  | $ | 103,989 |  |  | $ | 39,889 |
Schedule of information about MBS and CRT Securities that were in an unrealized loss position | The following table presents information about the Company’s residential mortgage securities that were in an unrealized loss position at December 31, 2019:
|  | Unrealized Loss Position For: |  |
|  | Less than 12 Months |  | 12 Months or more |  | Total
(Dollars in Thousands) |  | Fair Value |  | Unrealized Losses |  | Number of Securities |  | Fair Value |  | Unrealized Losses |  | Number of Securities |  | Fair Value |  | Unrealized Losses
Agency MBS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fannie Mae |  | $ | 57,884 |  |  | $ | 341 |  |  | 44 |  |  | $ | 605,765 |  |  | $ | 14,400 |  |  | 275 |  |  | $ | 663,649 |  |  | $ | 14,741 |
Freddie Mac |  | 1,224 |  |  | 2 |  |  | 1 |  |  | 154,284 |  |  | 3,966 |  |  | 101 |  |  | 155,508 |  |  | 3,968 |
Total Agency MBS |  | 59,108 |  |  | 343 |  |  | 45 |  |  | 760,049 |  |  | 18,366 |  |  | 376 |  |  | 819,157 |  |  | 18,709 |
Non-Agency MBS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected to Recover Par (1) |  | — |  |  | — |  |  | — |  |  | 7,492 |  |  | 9 |  |  | 1 |  |  | 7,492 |  |  | 9 |
Expected to Recover Less than Par (1) |  | — |  |  | — |  |  | — |  |  | 242 |  |  | 9 |  |  | 1 |  |  | 242 |  |  | 9 |
Total Non-Agency MBS |  | — |  |  | — |  |  | — |  |  | 7,734 |  |  | 18 |  |  | 2 |  |  | 7,734 |  |  | 18 |
Total MBS |  | 59,108 |  |  | 343 |  |  | 45 |  |  | 767,783 |  |  | 18,384 |  |  | 378 |  |  | 826,891 |  |  | 18,727 |
CRT securities (2) |  | — |  |  | — |  |  | — |  |  | 25,004 |  |  | 91 |  |  | 7 |  |  | 25,004 |  |  | 91 |
Total MBS and CRT securities |  | $ | 59,108 |  |  | $ | 343 |  |  | 45 |  |  | $ | 792,787 |  |  | $ | 18,475 |  |  | 385 |  |  | $ | 851,895 |  |  | $ | 18,818 |
(1) Based on management’s current estimates of future principal cash flows expected to be received. (2) Amounts disclosed at December 31, 2019 include CRT securities with a fair value of $25.0 million for which the fair value option has been elected. Such securities had unrealized losses of $91,000 at December 31, 2019
Schedule of composition of OTTI charges recorded | The following table presents the composition of OTTI charges recorded by the Company for the years ended December 31, 2019, 2018 and 2017:
|  | For the Year Ended December 31,
(In Thousands) |  | 2019 |  | 2018 |  | 2017
Total OTTI losses |  | $ | (264 | ) |  | $ | (1,259 | ) |  | $ | (63 | )
OTTI recognized in/(reclassified from) OCI |  | 84 |  |  | — |  |  | (969 | )
OTTI recognized in earnings |  | $ | (180 | ) |  | $ | (1,259 | ) |  | $ | (1,032 | )
Schedule of changes in credit loss component of OTTI | The following table presents a roll-forward of the credit loss component of OTTI on the Company’s Non-Agency MBS for which a non-credit component of OTTI was previously recognized in OCI. Changes in the credit loss component of OTTI are presented based upon whether the current period is the first time OTTI was recorded on a security or a subsequent OTTI charge was recorded.
|  | For the Year Ended December 31,
(In Thousands) |  | 2019 |  | 2018 |  | 2017
Credit loss component of OTTI at beginning of period |  | $ | 39,596 |  |  | $ | 38,337 |  |  | $ | 37,305 |
Additions for credit related OTTI not previously recognized |  | 180 |  |  | 1,259 |  |  | 63 |
Subsequent additional credit related OTTI recorded |  | — |  |  | — |  |  | 969 |
Credit loss component of OTTI at end of period |  | $ | 39,776 |  |  | $ | 39,596 |  |  | $ | 38,337 |
Schedule of changes in the components of the purchase discount on Non-Agency MBS | The following table presents the changes in the components of the Company’s purchase discount on its Non-Agency MBS between purchase discount designated as Credit Reserve and OTTI and accretable purchase discount for the years ended December 31, 2019 and 2018:
|  | For the Year Ended December 31,
|  | 2019 |  | 2018
(In Thousands) |  | Discount Designated as Credit Reserve and OTTI |  | Accretable Discount (1) |  | Discount Designated as Credit Reserve and OTTI |  | Accretable Discount (1)
Balance at beginning of period |  | $ | (516,116 | ) |  | $ | (155,025 | ) |  | $ | (593,227 | ) |  | $ | (215,325 | )
Impact of RMBS Issuer settlement (2)(3) |  | — |  |  | (2,077 | ) |  | — |  |  | (14,822 | )
Accretion of discount |  | — |  |  | 51,696 |  |  | — |  |  | 70,750 |
Realized credit losses |  | 28,152 |  |  | — |  |  | 42,246 |  |  | — |
Purchases |  | (624 | ) |  | (4 | ) |  | (2,512 | ) |  | 1,685 |
Sales/Redemptions |  | 34,510 |  |  | 32,453 |  |  | 12,987 |  |  | 28,336 |
Net impairment losses recognized in earnings |  | (180 | ) |  | — |  |  | (1,259 | ) |  | — |
Transfers/release of credit reserve |  | 17,660 |  |  | (17,660 | ) |  | 25,649 |  |  | (25,649 | )
Balance at end of period |  | $ | (436,598 | ) |  | $ | (90,617 | ) |  | $ | (516,116 | ) |  | $ | (155,025 | )
(1) | Together with coupon interest, accretable purchase discount is recognized as interest income over the life of the security.
(2) | Includes the impact of approximately $2.0 million and $12.1 million during the years ended December 31, 2019 and 2018, respectively, of cash proceeds (a one-time payment) received by the Company in connection with the settlement of litigation related to certain residential mortgage backed securitization trusts that were sponsored by JP Morgan Chase & Co. and affiliated entities.
(3) Includes the impact of approximately $2.7 million of cash proceeds (a one-time payment) received by the Company during the year ended December 31, 2018 in connection with the settlement of litigation related to certain residential mortgage backed securitization trusts that were sponsored by Lehman Brothers Holdings Inc.
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, 2019, 2018, and 2017:
|  | For the Year Ended December 31,
(In Thousands) |  | 2019 |  | 2018 |  | 2017
AOCI from AFS securities: |  |  |  |  |  |  |  |  |
Unrealized gain on AFS securities at beginning of period |  | $ | 417,167 |  |  | $ | 620,648 |  |  | $ | 620,403 |
Unrealized gain/(loss) on Agency MBS, net |  | 21,844 |  |  | (17,891 | ) |  | (39,158 | )
Unrealized (loss)/gain on Non-Agency MBS, net |  | (6,682 | ) |  | (131,939 | ) |  | 78,337 |
Unrealized gain/(loss) on MSR term notes, net |  | 5,173 |  |  | (812 | ) |  | 805 |
Reclassification adjustment for MBS sales included in net income |  | (44,600 | ) |  | (51,580 | ) |  | (38,707 | )
Reclassification adjustment for OTTI included in net income |  | (180 | ) |  | (1,259 | ) |  | (1,032 | )
Change in AOCI from AFS securities |  | (24,445 | ) |  | (203,481 | ) |  | 245 |
Balance at end of period |  | $ | 392,722 |  |  | $ | 417,167 |  |  | $ | 620,648 |
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 residential mortgage securities and MSR-related assets for the years ended December 31, 2019, 2018 and 2017:
|  | For the Year Ended December 31,
(In Thousands) |  | 2019 |  | 2018 |  | 2017
Agency MBS |  |  |  |  |  |
Coupon interest |  | $ | 82,446 |  |  | $ | 88,233 |  |  | $ | 96,678 |
Effective yield adjustment (1) |  | (26,545 | ) |  | (25,930 | ) |  | (31,323 | )
Interest income |  | $ | 55,901 |  |  | $ | 62,303 |  |  | $ | 65,355 |
Legacy Non-Agency MBS |  |  |  |  |  |
Coupon interest |  | $ | 87,024 |  |  | $ | 109,714 |  |  | $ | 127,645 |
Effective yield adjustment (2)(3) |  | 59,622 |  |  | 69,309 |  |  | 76,005 |
Interest income |  | $ | 146,646 |  |  | $ | 179,023 |  |  | $ | 203,650 |
RPL/NPL MBS |  |  |  |  |  |
Coupon interest |  | $ | 53,086 |  |  | $ | 46,339 |  |  | $ | 65,957 |
Effective yield adjustment (1)(4) |  | 338 |  |  | 1,434 |  |  | 1,505 |
Interest income |  | $ | 53,424 |  |  | $ | 47,773 |  |  | $ | 67,462 |
CRT securities |  |  |  |  |  |
Coupon interest |  | $ | 20,532 |  |  | $ | 30,628 |  |  | $ | 27,706 |
Effective yield adjustment (2) |  | (1,949 | ) |  | 2,748 |  |  | 4,009 |
Interest income |  | $ | 18,583 |  |  | $ | 33,376 |  |  | $ | 31,715 |
MSR-related assets |  |  |  |  |  |
Coupon interest |  | $ | 52,644 |  |  | $ | 27,174 |  |  | $ | 24,534 |
Effective yield adjustment (1) |  | 3 |  |  | 1,246 |  |  | 296 |
Interest income |  | $ | 52,647 |  |  | $ | 28,420 |  |  | $ | 24,830 |
(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, which is based on management’s estimates of the amount and timing of future cash flows, less the current coupon yield.
(3) | Includes accretion income recognized due to the impact of redemptions of certain securities that had been previously been purchased at a discount of $14.5 million, $2.7 million and $1.7 million during the years ended December 31, 2019, 2018 and 2017, respectively.
(4) Includes accretion income recognized due to the impact of redemptions of certain securities that had been previously been purchased at a discount of $329,000, $1.4 million and $1.2 million during the years ended December 31, 2019, 2018 and 2017, respectively.

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