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v3.20.1

Investments in Debt Securities Investments in Debt Securities (Tables) | 3 Months Ended
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Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract] |
Debt Securities, Available-for-sale [Table Text Block] | The following tables present the Company’s MBS by investment type (including securities pending settlement) as of the dates indicated:
| March 31, 2020 |  |  |  |  |  |  |  |  |  |
| Par |  | Net Premium (Discount) |  | Amortized Cost |  | Gross Unrealized Gain |  | Gross Unrealized Loss |  | Fair Value
Agency CMBS | $ | 2,104,738 |  |  | $ | 16,937 |  |  | $ | 2,121,675 |  |  | $ | 207,436 |  |  | $ | (892) |  |  | $ | 2,328,219 |
Agency RMBS | 868,191 |  |  | 19,240 |  |  | 887,431 |  |  | 44,005 |  |  | — |  |  | 931,436 |
CMBS IO (1) | — |  |  | 462,675 |  |  | 462,675 |  |  | 2,616 |  |  | (6,802) |  |  | 458,489 |
Non-Agency other | 1,833 |  |  | (686) |  |  | 1,147 |  |  | 472 |  |  | (57) |  |  | 1,562 |
Total MBS: | $ | 2,974,762 |  |  | $ | 498,166 |  |  | $ | 3,472,928 |  |  | $ | 254,529 |  |  | $ | (7,751) |  |  | $ | 3,719,706 |
(1) The notional balance for Agency CMBS IO and non-Agency CMBS IO was $13,274,419 and $9,680,637 respectively, as of March 31, 2020.
| December 31, 2019 |  |  |  |  |  |  |  |  |  |
| Par |  | Net Premium (Discount) |  | Amortized Cost |  | Gross Unrealized Gain |  | Gross Unrealized Loss |  | Fair Value
Agency CMBS | $ | 1,890,186 |  |  | $ | 15,414 |  |  | $ | 1,905,600 |  |  | $ | 93,763 |  |  | $ | (6) |  |  | $ | 1,999,357 |
Agency RMBS | 2,563,684 |  |  | 55,770 |  |  | 2,619,454 |  |  | 69,082 |  |  | (462) |  |  | 2,688,074 |
CMBS IO (2) | — |  |  | 488,145 |  |  | 488,145 |  |  | 11,760 |  |  | (863) |  |  | 499,042 |
Non-Agency other |  | 1,938 |  |  |  | (780) |  |  | 1,158 |  |  | 552 |  |  | (20) |  |  | 1,690 |
Total MBS: | $ | 4,455,808 |  |  | $ | 558,549 |  |  | $ | 5,014,357 |  |  | $ | 175,157 |  |  | $ | (1,351) |  |  | $ | 5,188,163 |
(1) The notional balance for the Agency CMBS IO and non-Agency CMBS IO was $13,404,824 and $9,799,629, respectively, as of December 31, 2019.
Schedule of Realized Gain (Loss) [Table Text Block] | The following table presents information regarding the "gain on sale of investments, net" on the Company’s consolidated statements of comprehensive income (loss) for the periods indicated (1):
| Three Months Ended |  |  |  |  |  |
| March 31, |  |  |  |  |  |
| 2020 |  |  |  | 2019 |  |
| Proceeds Received |  | Realized Gain (Loss) |  | Proceeds Received |  | Realized Gain (Loss)
Agency RMBS | $ | 1,817,350 |  |  | $ | 64,094 |  |  | $ | — |  |  | $ | — |
Agency CMBS | 173,684 |  |  | 20,689 |  |  | — |  |  | — |
| $ | 1,991,034 |  |  | $ | 84,783 |  |  | $ | — |  |  | $ | — |
Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block] | The following table presents certain information for the AFS securities in an unrealized loss position as of the dates indicated:
| March 31, 2020 |  |  |  |  |  | December 31, 2019 |  |  |  |
| Fair Value |  | Gross Unrealized Losses |  | # of Securities |  | Fair Value |  | Gross Unrealized Losses |  | # of Securities
Continuous unrealized loss position for less than 12 months: |  |  |  |  |  |  |  |  |  |  |
Agency MBS | $ | 322,607 |  |  | $ | (5,846) |  |  | 56 |  | $ | 215,792 |  |  | $ | (1,139) |  |  | 27
Non-Agency MBS | 115,425 |  |  | (1,804) |  |  | 51 |  | 13,607 |  |  | (146) |  |  | 7
Continuous unrealized loss position for 12 months or longer: |  |  |  |  |  |  |  |  |  |  |
Agency MBS | $ | 388 |  |  | $ | (79) |  |  | 2 |  | $ | 75,745 |  |  | $ | (35) |  |  | 2
Non-Agency MBS | 111 |  |  | (22) |  |  | 4 |  | 1,099 |  |  | (31) |  |  | 5

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- Definition Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27357-111563 + Details
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